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How is it that people in ALO didn't recognize Kirito?
So, I've been enjoying SAO quite a bit more than I thought I would. My only thing is, why has no one in ALO even questioned if Kirito is the same Kirito from SAO, especially his sister? I'm going on the assumption that there would have been some sort of news when he got out of the game and that his character name would have been mentioned. I know that if I see a character with the same name in multiple MMOs, I at least ask if they are the same person. I have to believe that SOMEONE would recognize the name at least.
Also, thinking back on it, I remember them reading something, seemingly the internet, inside SAO, that listed the news of what was going on in the game. So surely this was available to the outside world as well?

If Kirito is well known as "The Hero or Aincrad", then he would have made the news, and you'd expect an image of his avatar would as well.  You might even think that he would go talk to the news, make a book deal, or otherwise take advantage of his hero status.

ALO players
From Volume 3, Chapter 1, during the scene where Kirito first logged in into ALO:

Next I chose the nickname for my character. I didn't put much thought into it, but entered the name «Kirito».
This name was a shortened form of my real name, Kirigaya Kazuto, and there weren't many who knew that. Those who understood included only the rescue team from the Ministry of Internal Affairs, and those with a close connection, i.e. Recto's president Yuuki Shoujou and that Sugou. Of course, that also included Egil, and Asuna, who had yet to wake. Even Suguha and our parents shouldn't know of it.
In the SAO incident, none of this information had been made public, especially character names. This was because in that world there was frequent fighting between players and the result was often a horrible death in the real world. If unrestricted publication of this information was allowed, it would not be difficult to imagine a large number of lawsuits being filed.
[...]
With a bit of trepidation I realized the name was known to Sugou Nobuyuki, and because it is a rather well-known name I changed it from its romanized form to its kana form. [...]

According to the cited paragraph, since character names are not made public, the name Kirito is only known to the rescue team from the Ministry of Internal Affairs, Recto's president Yuuki Shoujou, Sugou, and fellow players in SAO.
ALO arc takes place 2 months after SAO is cleared. During this period of time, I would assume that it's unlikely for any SAO survivor to play another VRMMO when they had just been through a life and death experience.
Therefore, it would be natural for almost all players in ALO to be unaware of the identity of the person who cleared SAO and set all players free.
I guess that would clear the question of why no one in ALO ever questioned about Kirito's identity.
How about Suguha, then?
Suguha/Leafa
From Volume 3, Chapter 2, when Kirito crash-landed as Leafa/Suguha was surrounded by three Salamanders:

This voice with no tension came from a lightly dark skinned male player while standing up. His black hair stood in natural spikes, and his large eyes gave an impression of mischief. Behind him stretched dark greyish-blue wings that marked him as a member of the Spriggan race.

I guess Kirito's skin color and appearance is a great enough departure from his real life appearance that Suguha couldn't tell that Kirito is actually her onii-chan.
Apart from the appearance, there is also the fact that Kirito distanced himself from Suguha, after knowing that they are not siblings.
From Volume 4, Chapter 7:

Suguha's accusation that I had distanced myself from her because she wasn't my true younger sister was almost correct. I had searched the net for my family registry, but I had found the deletion notice, so I asked my parents about it. I was ten years-old. I began to put some distance between Suguha and myself, but there was no specific reason.
[...]
[...] By the time I was a 5th or 6th grader, I was already addicted to net games, without a side glance I moved straight forward. Finally I was imprisoned for two years, in that virtual world.

Due to Kirito keeping distance and the SAO incident, Suguha didn't have much chance to know Kirito, and there were many sides of him that she didn't know about, especially during the time Kirito was trapped in SAO. I think this contributes to the reason why Suguha/Leafa didn't realize that Kirito is actually Kazuto even after traveling together. She only caught on when Kirito blurted out Asuna's name after he failed to clear the Grand Quest for the first time.

Well, that is easy.
During the entire SAO incident:

Families that are rather sensitive to the entire locked in a game story, would not necessarily follow what is happening in this world. They would rather visit the family member in the hospital.
I am sure that for the first while that the majority of the people in the world were interested in the news to know what is going on. But just like today's society if someone hammers on one subject the entire time - you tend to turn the TV/radio down when the topic is about to be mentioned (Or in some cases you would zone out).

After the SAO incident:

Should this topic brought on by the media, they would most likely start of a conversation of all the people in the room. (And how many people that is up to date with technology reads the paper? Therefore I would conclude that the people in the game would not read more than a heading on a newspaper)
These that played ALO - was most likely just happy for those that got out, and sad for those that didn't. (Or they were to absorbed in ALO to care about SAO)

As to why Sugu didn't recognize him: She is most likely part of the first group of people who rather visit the hospital than read the papers/watch the news.
And if all that fails you, then remember: It was for the story. No other reason needed. If everyone knows who your character is there is not much to write in a story now is there?

I don't think that people in the outside world even had any idea what was going on inside SAO. Keep in mind, Kirito's government contact (Kikuoka) relied on his testimony to know what was going on in SAO. If Kirito had never told Suguha what his in-game name was, she never would've known. (The fact that ALO-Kirito looks suspiciously like real-life Kirito notwithstanding...)

Keep in mind that this is an anime and so little things like common sense do not really get in the way of story telling. The real problem with this all starts with the question which is based in common sense, and thus can not win out against the needs of story telling.
I understand that player information was given out, if it was forget law suits, laughing coffin members would of been gunned down on the streets for what they did. GGO would never of happened. However, while following the common sense of things, everything after the end of SAO would of happened differently. I believe it was stated that 6000 people and change were still in SAO when it came to an end. Most of those people woke at the same time. That would of been major news.
Most of those people would not know how they were freed, only that one moment they were in the game and the next that after an announcement that the game was cleared they woke up. However those members of the assault team they would know. The doctors and nurses that cared for them would likely question folks as they were seen and checked over. " It was amazing! Kirito saved us!" or versions of that statement would of passed unfiltered in the first few days. If not from Doctors and Nurses, from player to player. Most of the SAO players were in hospitals when they woke, so it is natural to assume numbers of them were in the same places. The SAO members would of spoken to each other if not the staff.
Kirito was well known in the game if not by his name, at least as the black swordsmen. Trying to keep the media from discovering the story of how they escaped in reality would of been like trying to capture water in your hands. You get some of it, but most pours through. Maybe they never link Kirito to his RL id, but that would only of raised the legend of Kirito that much higher. The hero of SAO humbly keeps his identity a secret?
For ALO, they used the same model for Kirito in that game that they used for SAO for our benefit, so we as anime watchers knew him the moment he was on screen. Asuna looks very different in SAO II from her SAO character and while I never forget who she is, it is an attention grabbing difference I never fail to notice. So I could almost forgive Suguha for not knowing Kirito in ALO right away. Siding with the answers others gave. However I'm not willing to. He does look the same, no matter the reasons. Maybe she does not know for sure that is him, and maybe he never talked about what his character name was in SAO with her. However she never questions him about just how very much he looks like Kirigaya Kazuto. That is pure story telling over common sense.
By the time SAO II comes along and he enters GGO There should of been lines of folks whispering rumors of him being the same Kirito from SAO, hell their should of been dozens of would be fame seekers running names like KiritoSAO, KiritoR1, and many others trying to cash in on fame that was not theirs. If any thing the only reason Kirito should not gotten much notice in GGO it is because people would of assumed he was another faker cashing in on the name of the Hero of SAO.
The answer to this question, pure and short, is Story. The writer of the manga and anime needed him to, and wanted him to, have less fame and acclaim then he would of had if something like this happened in our world. They needed his own sister/cousin to be utterly clueless about who he was.


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Godai's degree duration in terms of years
I wanted to know the duration of the degree of godai of maison ikkoku as it happened in anime by number of years.
Like it was of 4 or 5 years?
Mainly I am confirmed that it was a 6 year plot but not on godai's degree.Please if someone could confirm that for me.

Welcome to Anime.SE! If Godai said that the plot lasted for six years, then is there a reason you doubt him?

I mean I don't doubt that he said for almost six years he was in love.
It's just that I am not sure how long his degree went.like bachelor's is four years right so how six years?

And if six years is what it is then can you tell me the duration of his degree?

You mean how long Godai attended college? Then he didn't repeat any year, so it was 4 years, the standard duration of college degree in Japan (which was modelled on US).
You can see this for the timeline of the manga version. I've never seen the anime as a whole, but Wikipedia article says Godai got a job right after graduation (while in manga there was an interval), so that there is about a year difference between manga and anime.

So if it's 4 years which I also thought then why did godai said in the movie that he had been loving her for 6 years

Oh so I see the manga and anime timelines are different.He proposed to kyoko after he graduated while in manga there was 2 years that's why he said 6 years.Also in manga he taught yagami after he graduated which was not the case in anime.

Therefore the plot in the anime lasted for 4 years when he proposed kyoko and if we count the birth of his daughter then 5 years

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What is the name of the track/music that plays from 19:56 until 21:23 in episode 15 of Darker than Black?
I have been looking for this track for ages. It also plays in a lot of other places, like in beginning and throughout ep 16; when Mao wakes up hostage to Amber's group and meows; and in a lot of other places. What is it's name?

Not sure to what extent this could be considered an answer to my own question, but it seems this song is one of the many unreleased tracks Darker Than Black has. I have found that many people in Youtube  comments lament about this regarding many other DTB songs.

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Does Toriyama keep increasing Beerus’ power?
In BoG it was stated that Beerus was using 70% of his power against the Super Saiyan God.
Then we saw Super Saipan Blue being weaker than Beerus (while technically, regardless if it is a 50x multiplier or not, it should have overpowered the GoD).
After many arcs, when Goku And Vegeta had grown hugely more powerful than before, we see perfected SSJB Vegeta losing to Beerus (manga only).
Recently, we also got to see SSBE Vegeta (post Yardratian training) losing to a weak Hakai from the God of Destruction.
I mean, isn’t Toriyama just increasing Beerus’ power every arc? We have been told that he used 70% of his power against SSG, but now he can even defeat an enraged, super-trained SSBE while playing around!
What could be the possible in-story reason for this (except for making the story more interesting, of course!)?

I can't post an answer to this because I dont have references to post, but if you follow Dragon Ball closely you clearly see. 1- There is no in story explanation 2- They no longer follow that idea that Beerus has 70% of SGD power 3- Dragon Ball does this a lot,  it throws a lot of ideas and it doesnt care too much if they contradict each other 4- Many fans pretend there is an in story explanation but they are explanations created by them to keep the story consistent.

@Pablo , I understand what you’re saying, DB has some major issues, especially in Super, but they do need an explanation... Toriyama can’t always go around saying, “Oh! I forgot ‘bout that!”..

@SK-the-Learner Beerus' power comes from his status paired with this innate power and training, which I guess stands for the strength of his willpower. He is more powerful because he has a stronger will. You'll notice that most side characters (cough cough, Krillin) are weaker because they aren't as tenacious and singleminded as the likes of Goku or Vegeta.

@LiveInAmbeR willpower can be a source of power, but it can not provide several fold multiplication of power without proper training in years (Beerus has not been shown to do any training since those 39 years of sleep). Other character (like Goku and Vegeta) not only had a strong will, but they also implemented it in the form of intense training, while Krillin did not cope up with higher tiers of training’s that the Saiyans did.

To my knowledge, he only said he used 70% in the movie, which isn’t canon to the show or manga. In the show/manga (always go by the manga though, because the show isn’t canon to the manga, which is the original source), he never said how much power he was using. Basically, you should forget about trying to scale Beerus’ power.


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Could Bardock really go ultra instinct?
When Goku resorts to use Ultra Instinct sign against Gas (chapter 85), so that he does not need to make his heart calm, Gas seems startled at how he looks. He remembers Bardock having a similar aura:

In the flashback fight (chapter 83), Bardock defeated Gas with something similar to UI sign, where he seemed immensly stronger than just a few seconds ago (when he was being beaten up).
So, could Bardock really go Ultra Instinct or is it just a resemblance?
The doubt arises because Bardock's eyes seemed just as normal (when compared to those of Goku in UI):

Bardock can't, because he isn't the main character of the series, as for the drawing, you'll find almost all of the characters drawn similarly, except for their hairstyles.

While they may look similar, recall that the principles of Ultra Instinct are fundamentally different from what Bardock does. To even achieve something like Ultra Instinct would require years of training by Bardock. If the Gods of Destruction are unable to use it there's no reason to believe Bardock could just "use it". This is probably closer to the " pseudo-ultra instinct" that Roshi displayed during the tournament of power if anything.

Well I did take that into the account, but Bardock's strength seemed similar to how Goku unlocked UI for the first to in Tournament of Power, i.e., by being forced to the limit of bringing it out...

@SK-the-Learner DB characters, or saiyans in general, tend to break their limits a lot, that doesn't inherently prove its UI. Ultra Instinct is far from the on!y example of breaking in limits in DB

Probably bardock already obtained the power of UI, as per Whis's statement, any living mere mortal, angel, kai can obtain UI. Even yamtcha and krillin, perhaps who break through their limits and keep pushing with the desire of do something will obtain UI, except destroyers. Destroyers had their own form called Ultra Ego.


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What is the significance of "opening thread" in Demon Slayer?
It's been previously established that Tanjiro has a keen sense of smell and seen to always comment on the pungent smell of demons or the emotional states of people. In his very first training arc, he was mentored by Urokodaki, a former Hashira who also has a keen sense of smell. Then suddenly Tanjiro has a supernatural experience while training with the dead students of his master. So does he master his sense of smell to use in combat? Nope! He gains the ability to sense the "opening thread" i.e. The ability to sense when the opponent is left open for a finishing blow. But what does that have to do with any of the previously established plot points?
What was the point of the "opening thread" in the story? Did it have some sort of significance?

Yes, your point is correct, the opening thread defines where is the best place to slash the sword that will behead them in a single swing.
The opening thread scene only happens during Tanjiro's fight as it represents the keen sense of smell he possesses
This constantly reminds us how Tanjiro is different from others as others learn to do that through experience and training but he can do it just by sensing it
The same was seen in an earlier plot where he was returning from the village when his family was killed, he senses their smell from yards away while others could have only been able to realise in a close encounter

I agree, it does set him apart. But it also sets it apart from his keen sense of smell, making it seem like a completely different ability. The author could have called it something else. The smell of fear perhaps. Who knows why a thread was the way to go.

I think the name goes perfect, as the thread represents the connection between 2 things, so here opening thread shows us the connection between the sword and the head it's going to cut through his sense of smell

I have some queries so instead of commenting, I have asked: Is Tanjiro the only Demon Slayer to sense a "Opening Thread"? (cc @LiveInAmbeR)


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What is Hitsugi's age?
Hitsugi and Chitaru are yuri and assassinators in the TV show Akuma no Riddle, also known as Riddle Story of Devil. Chitaru's age seems according, but what about Hitsugi? She is really smaller than Chitaru.

Hitsugi and Chitaru are both at the same age, which is 15 years old. It is true that Hitsugi actually looks like a little girl, her height is also not up to her age, not even close, so it seems like Hitsugi is younger than Chitaru, but it's not.

Hitsugi doesn't even seem to have matured yet, which is the actual reason.

According to Akuma no Riddle AK, a social game which was released in 2012 (before the anime in 2014), Hitsugi and Chitaru were both 15 years old, even though Hitsugi was often to be mistaken as primary school student due to her short height.

Image courtesy of naomamayu's blog (Japanese)
*The game was shut down in 2015

To be fair, the Wikia used the same link as the reference, but didn't mention it explicitly. It was only mentioned on the revision history.

That is neat information. I had no idea that Akuma no Riddle was a game before it was TV show (and Manga?). It sounds similar to CLUE, in its own way.

Since everyone in Class Black is in Year 10, that would classify them as Sophmore. As they are Sophmore, it would make sense that they are 15ish or 16ish. Although some of the character's heights betray them as younger(Hitsugi and Haru) or older (Isuke and Chitaru), the age range can get confusing. So, it would seem like Hitsugi's age would be 15 years old.

VIDEO: FUNimation Posts "Riddle Story of Devil" English Dub Preview - Crunchyroll News
Funimation Reveals More Riddle Story of Devil English Cast - News - Anime News Network

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.

Thank you for the advise. I will edit this as soon as I can

Could you also [edit] and mention the source of the image? Is it an official guidebook or something?

Is this helpful now?

@AkiTanaka https://web.archive.org/web/20150927183207/http://www.funimation.com/blog/2015/09/23/riddle-story-of-devil-english-cast-announcement-round-2/

@ZeeBee thanks, while it's unclear if it's from an official guidebook or not, at least the source looks credible :)

Thanks, I guess?

You can add the link I found to your answer. It shows an archived copy of the source of the image on Funimation

okay, cool. thanks, Shaymin Gratitude!

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Who does Porco actually love? Gina or Fio?
I've just watched Porco Rosso, produced by Studio Ghibli and directed by Hayao Miyazaki. The whole film was just super good, but I had some trouble figuring out the romance part of the film.
At the start, it seems like Porco likes Gina and vice versa. However, after the introduction of Fio Piccolo as Porco's aircraft mechanic's granddaughter, it turns out Fio likes Porco too. Fio was only introduced almost half-way into the film, and coupled with the fact that Gina explicitly stated to Curtiss that she loves Porco, it seems like Gina would be Porco's girlfriend (if he ever decides to leave some time for romance).
On the other hand, however, Fio is always with Porco in the latter half of the film, encouraging and helping him, and she also explicitly stated that she likes Porco. Additionally, she first kisses Porco on the cheek when she says she likes him, and actually proceeds to a full-fledged romantic kiss on the lips at the end of the film.
So my questions are: who likes Porco more? Who does Porco like more?  And, most important of all, given the ending and circumstances, who is more likely to meet Porco again? The film is sort of a cliffhanger, especially with the romance part, so I would like anyone to share their thoughts on this.

"And, most important of all, who will most likely be Porco's romantic partner if he ever had one?" I'm afraid this will be speculative and opinion-based unless there's an official statement.

@AkiTanaka But most questions about anime and manga are opinion based, because official sources won't answer such questions. Anyway, I'm new to the Anime & Manga SE,  so can you please describe what kinds of questions are not opinion based, or, more generally, what questions are suitable for this site?

Because in the [Tour], it says that questions asking for anime recommendations, the release time of a new season of anime or manga, or asking for the name of an anime are all off-topic. So, what's on topic here? This question is the most on-topic one that I have, given the conditions already stated.

In the [Tour], it does say that "Plot, character, or setting explanations" are on topic here.  I think I am asking about the plot and characters here. Although I may be wrong. So, please tell me what kinds of questions are more on-topic, valuable, and beneficial for the community here?

I guess it's a wording issue. The first 2 questions "who likes Porco more? Who does Porco like more?" are okay because it assumes for the fact from official sources, and if there aren't, then it's still okay (potential answer: "it's never been stated officially, but..."). The next question is explicitly inviting the answerers to speculate "if he ever had one", which will be correct for any answer (e.g. popularity vote). I believe removing this question should be enough to make the whole questions on-topic, or otherwise by rewording it.

@AkiTanaka Thanks for the suggestion, but I do still want that last question in my post, so could you please tell me how to rephrase it to be on-topic? Thanks for any suggestions!

I'm not sure if I could rephrase it better. The best I could come up with is "In the end, did Porco end up with someone?" which might be obvious since it's a cliffhanger and hence your question. (That said, I won't vote to close this question just because of that, nor I can't, because my vote as a moderator is binding...)

@AkiTanaka Thanks for the advice, maybe I'll think of some way to rephrase it myself.

@AkiTanaka I've just edited my question, check it out. And please tell me if you think it solves the problem or  improves the post.

I personally think that's better, and I don't really have any problems with it :)

@AkiTanaka Thanks for your feedback, and also thanks for your suggestion because I think my question is now more well-received.

I happened to read the original story for Porco Rosso and a memoir by Ghibli Producer (this) . In the original, there was no GIna, and she was an addition in the movie to 'explain' why Porco is a pig in the first place. In this sense, from Hayao Miyazaki's perspective, Fio may be more important.


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What were the Oryo family's paintings meant to depict?
Rikako Oryo was the daughter of a genius artist and strictly moral person. As far as I have understood, her father tried to depict the principle that humans can advance their morality by exposing themselves to darker side of humanity. The paintings that he created are gruesome and I do not understand what exactly he wanted to depict through them. His philosophy, and that of Rikako, was difficult for me to grasp.
What did the paintings of the Oryos depict exactly? What caused Rikako, a daughter of a strictly moral person, to become a serial killer? Was it the charisma of Makishima that caused her to get manipulated? Furthermore, what did the earlier two plastic models created out of that congressman and an enforcer that Kogami said about, symbolize? These things just add to the gore and seem meaningless. Are they really just meaningless?

Rikako Oryo and her father were both mentally distorted people, although only Rikako became a serial killer. The reason for her drawings and actions and that of her father were quite different.
My interpretation is that Rikako's father Roichi was an artist, as well as a person who felt that people had lost the sense of motive for life. Roichi thinks that through gruesome depictions, people will find the will to move forward. However, he died due to Eustress Deficiency himself, an indication that his paintings and ideas were of no use.
Rikako's motive for her serial killing and gory paintings were different from Roichi's. Her motive was the death of her father. Although in part, she also follows her father's philosophy, we can assume that her main motive was anger and seeking revenge on the Sibyl society for her father's death. After all, the Eustress Deficiency is a disease directly related to the Sibyl system. She hates the system, and hopes to bring it down by killing people and telling others that the Sibyl System does not protect citizens from gruesome murders.
Another possibility is that she simply followed Makishima's orders to mimic Kozaburo Toma's killings. Additionally, she follows and obeys Makishima due to Makishima's ideologies and intention of bringing down the system, which both align with Rikako and her father Roichi. Thus, although we can safely assume that she will commit the murders anyway even if Makishima hadn't helped her, the success and cruelness were caused mainly by Makishima.
Finally, the two plasticized human bodies of the congressman and Enforcer Mitsuru Sasayama were not the work of Rikako. They are two of the victims of the grotesque serial killings by Toma. Toma's motivation was unclear, but it may have been similar to Makishima's.


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Kakegurui another math help request
In Kakegurui manga chapter 3, Yumeko bet all her 40 chips on number 24 and she claimed that if the sword happened to face up on number 24, Yuriko would lose with the total debt of 21億7000万円. How to get this number?
Based on my understanding, both players agreed to bet 40 chips in this round. So if Yumeko is lucky, she would earn 30*40=1200 chips (I assume these chips come from Yuriko's side? If so, she would lose 1200 chips in exchange). The chip difference between these two players would be (40+1200)-(40-1200)=2400. So since each chip is worth 100万円, Yuriko will lose with debt totalling 24億円...
Where did I make a mistake?
I already read this question but it didn't help much.

If you say you answered your question, you could post it as an answer (and I think you can accept it too, but I don’t know if you get rep from that).

You are not alone. I’m the one who asked the first question about Kakegurui and accepted the answer for it. But I’m still not convinced how it works. It’s like we bet $10, and you win. I have to pay you $10, and you have to be paid $10. Then, I conclude that I have to pay you $10 + $10 = $20. It doesn’t make sense! Sometimes I read the answer and get convinced, and sometimes not :)

I reread the story and it appears to me that I overlooked the fact that Yuriko bet 5 chips on 24 as well.
So suppose the sword is facing up on 24.
According to the rules,
Yumeko gains 30*40=1200 chips, while Yuriko loses 1200 chips.
Yuriko gains 5*30=150 chips, while Yumeko loses 150 chips.
So the chip difference is now (40+1200-150)-(40+150-1200)=2100.
Also there is another rule that states that any chips that "missed target" (外れ) will go to opponent. In this case, since Yuriko already placed 5 chips in 7 other numbers, she must hand over Yumeko 5*7=35 chips.
Now the final chip difference is (40+1200-150+35)-(40+150-1200-35)=2170, which is worth 21億7000万円 as expected.


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Is Kakashi mangekyo sharingan different?
I am re-watching this great show, however I noticed something that caught my eye and made me ask this question is kakashi's mangekyo different, because as we know in the episode "Five Kage Summit Eve" we see Obito use his mangekyo to travel( Its like a teleportation jutsu except that he goes through the kamui dimension. Meanwhile we've never seen kakashi teleport himself he is only able to use kamui on other objects like in episode 82 "Team 10" where he  uses it on deidara's arm and episode 159 "Kakashi" where he uses it on the nail that pain had thrown and the missile that was fired at choji. So what make kakashi's sharingan abilities different from obitos, and does this mean that all the other mangekyo users have a similar trait?

I don't quite have the patience to write a full answer with references, but the size of it is that mangekyo sharingan having specialized abilities in each eye is a thing in Naruto, going back to Itachi having Tsukuyomi in the left eye and Amaterasu in the right eye. This seemingly applies to the kamuis, but later on Kakashi actually manages to figure out how to use his kamui to teleport himself. That may possibly imply that long range kamui is the left-eye ability, intangibility is the right-eye ability (I don't recall Kakashi ever doing it with just one eye) and self-teleportation is shared.

This question is similar to: Why couldn't Kakashi pass through things?. If you believe it’s different, please [edit] the question, make it clear how it’s different and/or how the answers on that question are not helpful for your problem.

Of course it is different. You can tell by looking at the black shapes in their sharingan eyes.
Look!
Kakashi's Mangekyo Sharingan:

Itachi's Mangekyo Sharingan:

And they also have different abilities/techniques.
But Kakashi's Mangekyo Sharingan is identical to Obito’s because the Sharingan is a gift from Obito Uchiha. So they both use the kamui technique.
EDIT:
Hmmm.... let me think.... I can only offer two possibilities now that I thought about it and looked it up.
1.) An Uchiha can use the sharingan at its full potential
2.) The reason behind it is the difference between the functioning of both eyes.
Resource: https://www.sportskeeda.com/anime/naruto-why-kakashi-able-use-kamui-s-intangibility

Yes I know that each sharingan user sharingan is different but my question was obitos ability uses transportation on himself while kakashis uses it on other objects

Hmmm.... let me think.... I can only offer two possibilities now that I thought about it and looked it up.

1.) An Uchiha can use the sharingan at its full potential

2.) The reason behind it is the difference between the functioning of both eyes.

Resource: https://www.sportskeeda.com/anime/naruto-why-kakashi-able-use-kamui-s-intangibility

I see, I understand that kakashi's left has a long distance while obitos is close distance.

But what would that mean if madara had given someone one of his eyes, say the right eye, that has the ability to reverse time in battle. What would the left eye be able to do. For example, sasukes left eye manipulates the shape and form of the amaterasu while the right casts it.

Hmmmm..... I'm not so sure, but that is a Good Question. Well, I actually never saw any of the Shinobi from the Uchiha Clan who have the power to reverse time. However, I guess if I were the creator of Naruto, I would say that the left eye would have the ability to freeze the enemy in place for a few seconds (like how you stop making movements when time is froze). If that makes sense in a way.

Eye is same but functionalities are different: Why couldn't Kakashi pass through things?

I should have known that the functionalities are different even if the eyes are the same. No wonder Kakashi couldn't make himself untouchable just like Obito can.


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What is the Japanese term for an old man/grandpa who is into anime/is otaku?
Is there a casual/slang term in Japanese for an old geezer who's a hardcore otaku? I know terms like erojiji and such but there are more referred to old men who are just perverted in general, but what about perverted old otaku?

Cross-posted to Japanese.SE: Is おたくじじい a proper term to describe an old man who's into anime or is there another slang term for it?

Define old men. When does one becomes old? (sorry for being rhetoric). I can think of "kimo-ota" or kimochi-warui otaku which roughly translates to disgusting or filthy otaku. They are kind of dirty, unhygienic and unemployed people who are obsessive about anime. Although I don't know the correct term for "Perverted old otaku" in japanese but it may come under kimo-ota.

Kitanai rōjin is what I have found about from your question.
It means dirty old man too if you want to translate.


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Shouldn't Naruto be able to regain Kurama's chakra, and Sasuke, his Rinnegan?
The following contains spoilers about recent Boruto chapters. Markdowns will still be added.

 As of Chapter 53, Boruto was controlled by Momoshiki via Kāma, then proceeds to stab Sasuke's left eye which possesses a Rinnegan in order to block him of Amenotejikara, his Space-Time ability. And also, of Chapter 55 of the Boruto manga, Kurama dies after the use of "Baryon Mode" which combined Naruto and Kurama's chakra.

I will be breaking this question down as to why I feel Naruto and Sasuke should be able regain these powers, starting with Naruto.
According to the wiki:

The Ten-Tailed Beast (十尾, Jūbi) is the original, primordial demon of the Naruto universe. All nine of the tailed beasts are but portions of chakra divided from the Ten-Tails.

Considering the Ten Tailed Beast (Juubi) is the combination of all nine Biju's (Tailed Beast) Chakra, this should mean logically that Kurama's chakra is the mixture of all Tailed Beasts from one to eight tails. Considering this, the Bijuu should be able to reform Kurama's chakra by mixing theirs, and give it to Naruto so he can get some Nine-Tails chakra back. Should or shouldn't this work?
Now, to the second part of the question.
According to a Reddit page I found:

Sasuke already possessed the chakra of Indra when he receives half of Hagoromo's chakra, so he is able to awaken the Rinnegan! ... Sasuke literally got Chakra from the sage of six paths thus also getting a rinnegan because you could say that he has both indra and ashura's Chakra because he has sage of six paths Chakra.

Sasuke awakened a Rinnegan because Hagoromo's Six Paths chakra synced with his left eye's EMS, thus forming a Tomoe-Rinnegan. Considering Sasuke still possesses Six Paths Chakra (as to why his Chidori is sometimes purple, he adds Six Paths Chakra to it)

 Shouldn't he be able to awaken a new Rinnegan in his left eye if he replaces it, due to the Six Paths Chakra once again syncing with his left EMS?

Well based on the above facts I could say maybe since most of the time the sharingan users are bound to control a power based on emotions. On his case, true he has the power of Six paths Chakra but when he uses the rinnegan you can witness that he needs to charge it to it's full capacity which is why you could see the Tomoe those dots represents the charged state. So I guess he can bring out the rinnegan in his left eye but will he be able to use it for that I would say it might take time.

Before answering the question, I will need to discuss some of the flaws in your assumptions. Firstly, the sum of the first eighth tailed beasts chakra does not equate to the Kurama (nine tails) chakra. Although kurama is the most powerful of them all, the tailed beast power equivalency is not exactly like a russian doll stack up. All of the tailed beasts are unique sentient masses of chakra that were gotten from splitting up the ten tails, hence, combining their chakra together can only if ever, reproduce the original (ten tails).
Secondly, although we were never explicitly told why sasuke was only able to awaken one Rinnegan, I agree with Madara's Ghosts answer that this was more likely as a result of insufficient chakra  from Hagoromo to completely awaken a complete set.
Thirdly, whether Sasuke still possesses SO6P's chakra is unknown. However, we can kinda assume that neither he nor Naruto still do. I firmly believe that they both exhausted that Chakra during their final battle, cause when you think about it, both of them have not displayed even close to the level of strength that they both used during thier final battle (not even against Isshiki who wrecked them big time. why would they choose not to use SO6P's chakra in such a life-death situation?? hint: cause they don't have it).
Now to answer the question, taking a piece of all the tailed beasts would not recreate the Kyuubi. However, it is possible for someone with a god-like understanding of ying-yang release to actually use the creation of all things technique to split up a ten tailed Juubi into a new set of tailed beasts. But then again, no such individual capable of such a feat currently exists.
With regards to Sasuke's Rinnegan, it's fair to say its gone forever. Unless maybe there are some spare Rinnegans chilling in some "filler-fanservice excuse of a lab".

Since you asked about Kurama I'll say about the past and present of it
Nine Tails
Past:

Controlled by one of the badass ninja named "Uchiha Madara".

Forcefully placed into Naruto by his parents cause they don't want the village to be destroyed and sacrificed him.

When Naruto used the power it wasn't compatible with his puny body so it tends to go berserk many a times. (You might have watched the anime so I'm just saying stay with me here)

Kumara is a prided beast so it just accepted to work along with him rather than get controlled.

Present:

He still is prideful and loves the journey with Naruto more like nakama (Friends).

So to answer your question, kurama still has it's pride as the strongest one among every others. So, it would think if by using those combined powers only they could survive it would rather try and die than get help.
So to conclude on this it is it's pride that kills it. And well you know the tailed beasts can reincarnate after they die.


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Why can't the top demon control Liebe?
My question is if the Demon Lord in the past can control the null magic demon Liebe when he was with Asta's mother.
Why can't he control him when he is fighting with Asta on they're Black Bull's Base while being inside the spade kingdom's top tier fighter?

Firstly liebe didnt had any magic not even anti magic so he couldn't do anything. He got anti magic after lictha (Asta Mom) sealed him in the five leaf grimoire
(https://i.sstatic.net/0S5Ti.jpg)
he cursed the other devils until he got his anti magic (https://i.sstatic.net/PtQXT.png)
(https://i.sstatic.net/j4ipM.png)
I think since he has anti magic lucefero couldn't posses him.since he was canceling all magic around him
(https://i.sstatic.net/cA3KD.png)

Liebe does not have the power of antimagic. He has no magic at all. Therefore he cannot be controlled by the Demon Lord.


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Where can I find the Boruto series in English dub?
I want to watch Boruto, but all I can find is Boruto in Japanese voice.
Are there any sites that have Boruto in English dub?

Welcome to Anime & Manga! Take note that this site doesn't condone piracy, so we will only mention legal/official sites if they exist. Answers/comments that mention questionable sites will be removed without prompt.

Unfortunately, Boruto has stopped being produced in English-dub due to the ongoing COVID-19 pandemic, however, English-dub episodes were still being produced while the pandemic hadn't spread as much.
Boruto has about 53 episodes in English, with the rest being in Japanese, and the sites that have Boruto in English are:

Hulu. Streams all 53 English Boruto episodes.
Amazon Prime.
Crunchyroll
Funimation.

This is about all I could find, but please note there are only 52-53 episodes in English, and was postponed due to the COVID-19 pandemic. However, most sites do offer it in Japanese with subtitles.


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Why did Kaneki eat Hide's face instead of any other body part?
At the end of season 2 of the anime Tokyo Ghoul, Kaneki ate part of Hide's face as mentioned in the manga but eating a body part like his hand would have left Hide in better condition, so why did he specifically eat his lower face?

If Kaneki had eaten another part, I believe the damage to Hide would be much greater, possibly leading to his death.
Maybe the mouth was the best option
"Hide lets Kaneki eat his face to get back his strength. While it appeared at first that Hide had died in the process, he reappeared later as Scarecrow, an ally of Kaneki and the ghoul hunters."
"Kaneki had eaten the lower part of Hide's face and that's why his voice box was also eaten. He wasn't able to speak properly but he found an alternative for his voice box and you can see that on his throat."
I get these quotes from:
https://www.quora.com/What-happened-to-Hides-face-in-Tokyo-Ghoul-re-season-2


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How did Tatsumaki get her powers?
I came across this question and started wondering something: how did Tatsumaki get her powers in One Punch Man?
Some people get their powers naturally, as Saitama did:

Although he tells everyone he got his incredible power through mere physical training, no one believes him at all. According to Saitama, after a year and a half of 100 daily push-ups, sit-ups, and squats, plus 10 km daily running, he had achieved some level of superhuman strength. (source)

And some achieve their powers through scientific body modifications, as seen with Genos:

One day when Genos was 15, a crazy cyborg destroyed Genos' town, killed his family, and left Genos alive and severely wounded. Professor Kuseno, a doctor of justice, found Genos and modified him into a cyborg at Genos' request. (source)

I speculated that Tatsumaki received her powers biologically, but where I currently am in the anime (I don't follow the manga), this has not been proven, and would lead to the question as to where whoever she inherited her powers got them from (which would cause a infinite loop).
So, how did Tatsumaki get her powers? Is it ever canonically explained?

I could very well be mistaken, but I think Tatsumaki and her sister Fubuki are born espers? Will have to search and see whether this is explicitly mentioned anywhere…

@Bahudari I think it is shown in the lastest chapters of the manga that Tatsumaki had her powers from a young age and the bureau wanted to recruit her ASAP.

Tatsumaki powers were developed through experimentation after she was sold to scientists by her adoptive parents at the age of 7. Her traumatic experiences and the terror instilled by her older sister also contributed to the awakening of her psychic abilities

In which chapter of the manga is this explained?

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.


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What chakra nature does the Nine-Tailed Fox have?
I want to know the chakra nature(s) of the Nine-Tailed Fox,
Kurama. Not the chakra nature of Naruto, I already know that. This is all I need to know.

According to Narutopedia, the anime version specifies both fire and wind natures.
The reality is that the Bijuu are just a huge mass of chakra, and specific elemental natures don't really matter when you're dealing with chakra at that magnitude.


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What is the song in Naruto Shippuden that plays in episode 3 at 7:45?
The song occurs at 7:45 after Sakura punches the ground when trying to find Kakashi. It also occurs in several other episodes but I cannot find the OST.
Can someone help me find this?

A fire inside by Yasuharu Takanashi.
All complement to shazam.
Didn't find it on youtube but this might help


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Where can I buy the complete bands of "Princess" manhwa from 1995?
So I read this manhwa and it's called Princess from 1995. It's old but gold.
I really want to buy the physical bands but I can't find them.
Has anyone heard of this manhwa and knows where I could buy them?
Or does someone generally know where to buy old manga that aren't being printed anymore?

Welcome to A&M! Which language are you looking for specifically? If english, it might be a tad tough to find fresh prints, as the english publisher went defunct.


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What do I watch after finishing the original Naruto series?
I just finished the last episode of Naruto on Netflix. It was the episode where Naruto went out on a journey with Jiraiya. What episode should I watch next? Do I go straight into Shippuden?

Well, like you said, you just finished Naruto. There isn't something in between Naruto and Naruto Shippuden so, it's time you get into Shippuden.
Additionally, I recommend watching Naruto by skipping fillers, except for the ones where they show the past.


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Why did Tobi wait until Itachi died before he revealed himself as Madara?
When it comes to manipulation, deceit, and lies, everyone pales in comparison to Obito Uchiha and Madara Uchiha who devised the whole Akatsuki plan (well, maybe, except Zetsu).
Madara offered Obito his identity. Obito walked the earth as Madara but most knew him as Tobi.
When Itachi Uchiha died, as soon as Zetsu announced that Itachi is no more, Tobi for the first time revealed his Madara voice and let Kakashi and the Leaf Shinobi see his Sharingan.
The part I never quite grasped about the Tobi persona setup was:
1- Obito patiently waited so many years and kept presenting himself as Tobi (except to Pain, Itachi and some others), so what is the reason which made him decide the time has come to blow up his persona?
2- What has he been waiting for before revealing himself? Is the death of Itachi somehow a factor for his revelation?
3- What big impact did the Tobi persona bring to Obito, why not straightforward present himself as Madara? The reason he played Tobi did not bring much as far as I can think.
Also, at the start of Shippuden, when Sasori died and Tobi and Zetsu scavenged the remains of the battle, why Obito had to keep up his persona Tobi in the mere presence of Zetsu who not only knew he pretended to be Madara, but also knew him as Obito?
Please enlighten me.

Update: Late in the episode: Episode 455: Itachi's Story--Light and Darkness: Moonlit Night, Obito says something to Itachi that supports what I wrote below. It's basically an answer to this question in his own words.

Tobi: Within the organization, I'm known as Tobi. I'm not an official member. I'm a newbie within the Akatsuki who doesn't possess any spectacular jutsu. You should treat me as if that's true.
Itachi: Why hide your identity?
Tobi: If people knew Madara Uchiha was still alive, things would become complicated. Only the Akatsuki leader who we're meeting knows the truth.

The Tobi persona was actually very useful for keeping the heat off of him. Let's not forget that for most of the series, Pain was the acting leader of the Akatsuki. Obito was in the shadows, pulling Pain's strings. We can see this pay off, because he manages to avoid Jiraiya investigating him (he investigates Pain instead). And since he would rarely be around the Akatsuki, Obito was likely able to frustrate Itachi's efforts into looking into him (given Itachi never seems to have discerned he wasn't actually Madara). Itachi and Jiraiya are two people you definitely want to avoid sussing out your secrets, so I'd say staying in the shadows for so long was a really smart move.
I'll note, as said in another answer, Itachi was aware Tobi was Madara Uchiha. The Itachi light novels show him intuit this. Itachi actually comes dangerously close to guessing Tobi might be an Uchiha who went missing during the war (the truth), but in the end decides he must be Madara Uchiha. (see my answer here for quotes: https://anime.stackexchange.com/a/66266/19307)
Even after joining the Akatsuki as Tobi, Obito flies under everyone's radar because he acts like a total moron. Thus, he's still kept out of scrutiny and danger, as most people would rather try to investigate the leader Pain. But at the same time, the Tobi persona gives him the ability to monitor Akatsuki operations and members up close (such as Deidara).
Let us also remember what happens when Tobi reveals himself as Madara Uchiha to the kage. He's perceived as enough of a threat that the five great nations join together to try and crush him. That's how powerful the name Madara Uchiha is. If he'd revealed that too soon, before he was ready, all the Biju may have forever slipped out of his grasp. Obito has to carefully plan when and where to play this dangerous card, and he only goes public with it when he's reached his endgame. This isn't to say he never used this card before then; he revealed himself as Madara Uchiha to several individuals.

I believe it is because the reveal of him being Madara wasn't just that, but a clear declaration of war, and while Obito knew that if he were to do that before Itachi died, Itachi would have been one extra nuisance to his plan because Itachi's unique ability and having Shisui's Sharingan could cause his plan to end before it even started.


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Why does Code still have his Karma even after Isshiki reincarnated?
When Isshiki reincarnated through Jigen, why did Kawaki lose his Karma mark yet Code never lost his?

The variant has never been seen before, but Code breaks down why he has it. The villain admits the White Karma is left behind when the black mark fails to take. A white symbol indicates the wearer is not suitable to become an Otsutsuki vessel, but they can withstand the clan's power.

The White Karma is a variant of the normal, black Karma seal which, as usual, grants the holder the power of the Otsutsuki which placed the Karma, although they do not become a vessel, which is a very rare case. Code was one of the exceptions, and he did not become a vessel of Isshiki Otsutsuki although a Karma was implanted in him by Isshiki.

Kawaki no longer has his karma seal. At least currently speaking. And that is because Isshiki Otsutsuki was forced to choose Jigen as his vessel. ... This is done to prevent a duplicate Isshiki Otsutsuki walking around, so, because of that, Kawaki lost his Karma seal.

Code would not lose his Karma because he is not a vessel, and when two or more people are the vessel of one Otsutsuki, once revived in one vessel, the other Karma will disappear. As Amado explained, this is likely a safety feature that the Karma has to prevent duplicate personalities from being revived.
Code's Karma did not fade because he isn't a vessel of anybody, he just has the Karma as a weapon. It would only fade if he had a complete Karma, not a white one that just amplifies his strength.

Sources:
Naruto: What do we know about the White Karma? - Comic Book
Boruto Chapter 47: How did Kawaki get his Karma Seal Back?


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What song is playing in Naruto Shippuden episode 114 at 17:54?
There's a song playing in Naruto Shippuden episode 114 at 17:54 while Orochimaru is trying to take over Sasuke's body with the transference ritual but Sasuke overcomes him instead.

The song is Sasuke's ninja way
https://www.youtube.com/watch?v=AastZeIJJDA&ab_channel=quinny366


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Is the Vanishing Rasengan more powerful than the regular Rasengan?
In the anime, Boruto creates a Lighting Release version of the Rasengan that has the feature of turning invisible. How about his power?
Is the Vanishing Rasengan more powerful than the regular Rasengan?

It depends on who is using the Rasengan.
Someone like Naruto or Minato can make the Rasengan of its normal size would generally have a stronger one, but someone like Boruto who doesn't have the chakra to make it's size correct may make a weaker one. It's safe to assume that someone who has completely mastered Rasengan and can make it of normal size would have a stronger Rasengan than Boruto's Vanishing Rasengan.
In Chapter 54 of Boruto, Borushiki stated that Vanishing Rasengan is too weak to be a mortal blow, but is very painful when hitting the vitals. A mastered Regular Rasengan is strong enough to be a mortal blow, and even stronger when hitting the vitals. Because of that, Regular Rasengan is probably stronger than Boruto's Vanishing Rasengan.
It's just a problem of Boruto's chakra compared to people who have mastered a normal Rasengan.

It really just depends on how much energy(chakra) the user has, as the vanishing rasengan is an "invisible" rasengan, considering the user Boruto isn't as "strong" as naruto or minato or Jiraiya.
But if Naruto could use the vanishing Rasengan it will surely be stronger than the rasengan

Welcome to Anime & Manga! While we all appreciate your contribution, it's better not to answer old questions when you have nothing to add to the already existing ones nor contradict. It's also better to include relevant sources/information in your answer.


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Why didn't Naruto and Sasuke feel a disruption in their chakra when Madara and Hashirama were reanimated?
Hagoromo stated that, when Indra and Ashura reincarnate, their chakra dwells inside you as well. And its shown that Edo Tensei shinobi regain everything they've lost when reanimated, such as when BOTH Madara and Nagato had a rinnegan. So, Hashirama and Madara should've regained Indra and Ashura's chakra, as when reincarnated it is in you. So, since you regain everything you've lost, Naruto and Sasuke would have had their chakra, as Hashirama and Madara. There'd be two Indra's and two Ashura's, so shouldn't  Naruto and Sasuke felt a disruption in their chakra when Hashirama and Madara got revived?

Yes but no, one because they don't feel a disruption in their chakra, but in general, as long as Naruto or Sasuke had some form of sage mode enabled, then sage mode would allow them to sense a strong appearance of chakra. Naruto would be able to sense all the Kage as well as Sasuke and all the Edo Tensei, ever sense the war ark started... so PLOT HOLE.


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Just what does the word "canon" mean when referring to anime?
I've been wondering for quite a while. Each time I have questions about either anime or manga, someone always refers to the word "canon", or "non-canon".
I've searched up what the word means on Google to help expand my understanding on it, and many answers that differ very much show up. It's helped me in no way at all.
What does the word canon mean and how does it refer to anime or manga?

Related: If the anime came first, what is considered “canon”?

Hmm, perhaps the title of the question doesn't really look related, but the answers there explore more about how "canon" being defined for multiple media works (e.g. anime original, compared to manga-to-anime adaptation), because official works can also be considered as non-canon (mostly anime movies that don't affect the official storyline).

Something being canon essentially means it's true to the primary1 storyline. A good example of this would be when talking about fanfiction - if a fanfiction has two people dating in it, it would be canon if those two characters are actually dating in the storyline of whatever the fan-made work is based on. It would be non-canon if that's not true.
This isn't just limited to anime or manga; this refers to any fictional story when talking about artwork, literature, discussions, etc produced by fans or non-official sources.
For example, when talking about "ships" between characters, it's canon if they are actually in a relationship. If they aren't and it's just what fans like to speculate about, it's non-canonical. Of course, it's not always this binary; some things are heavily based on real parts of the story but the speculation itself is either false or might be unconfirmed.
1As Pablo pointed out in the comments, I originally had "official" here, but there is an important distinction to make - a company that owns the rights to this media may produce official additional media that may not canon because the author of the original work didn't have any contribution or say in it, but it is still official because it is produced by the company with the copyright.

I would change the word "official" by "primary". A work can be official but non canon. Examples of this is when a company which owns the rights to a work does versions of this work without having the original author involved. Or when an american company which created a movie or series franchise licenses to a third company for it to make comics of it, with authors who had nothing to with the original work involved. Those works are official but usually considered non canon, because what happened in those stories arent taking into account when writing stories for the main continuity

Dragon Ball GT for example is official but non canon. Or the Dragon Ball movies of the 90's

@Pablo Very good point. I'll change the wording - thanks.

Simple Definition
What canon is, essentially, is a descriptor for describing whether an event, arc, or some other part of a story actually happened in that story. When we're talking about anime/manga, we often get different versions of the same story due to it being present in three main mediums: anime, manga, and light novels (other forms can exist, such as live-action adaptations and movies). Discrepancies/differences can exist between these different versions. The anime might add new story arcs, as in Naruto. So one might ask, "Is this arc canon?". And people will probably point you to the manga as the most authoritative for Naruto, since this is the source material, and will inform you that because these events and characters are not in the manga, they are non-canonical. Therefore, none of that actually happened.
We see this pattern often: the original work (usually the manga or light novels, but it can be the anime as well, as in the case of various Gundam series) is considered to be the most authoritative. The most canonical. Or in simpler words, the truest and most accurate version of events.
Not So Simple (With Examples)
In reality, canon isn't nearly so clear cut. You can, for instance, talk about an arc being canonical to the anime but not the manga. All of the filler arcs in Naruto are officially licensed episodes whether or not Kishimoto had a hand in making them. And actually, the original mangaka is sometimes involved in filler. Toriyama is alleged to have helped with filler episodes in the Dragon Ball animes, including with the design of Gregory, a filler character on King Kai's planet.
It isn't even the case that anime exclusive events are always non-canonical to the manga. For instance, in A Certain Scientific Railgun, some anime exclusive characters get brief cameos in the manga, which suggests that the arc in the anime (or some unknown variation of the arc) is actually canonical to the manga as well. Read my question and answer here for more on that.
And since we've gotten into A Certain Scientific Railgun, it should be noted that this series is itself a spin-off manga derived from the light novel series A Certain Magical Index. With Index the light novels are the source material and most authoritative, but there is no Railgun light novel series, so it is the manga that is most authoritative, and is on the same level of canon as the Index light novels. There are various other manga series as well (A Certain Scientific Accelerator, A Scientific Railgun: Astral Buddy, etc.). This collection of works is all canonical to what is referred to as the Raildex Universe.
Let us also consider the example of Fullmetal Alchemist. This is a manga series that spawned two anime series: Fullmetal Alchemist (2003) and Fullmetal Alchemist: Brotherhood. The latter follows the original manga more closely, while the former diverges in the middle and gets a different story and ending than the manga. One could say that the original anime is simply non-canonical, but I would suggest that it is more useful (and makes more sense) to say the 2003 anime follows a different canon. One could then say things such as, "This character is only canonical to the 2003 series", or "This event is shared in both canons". The manga and Brotherhood anime can certainly be said to be more authoritative, since they follow the story the mangaka created, but one needs to be flexible with this terminology so as to not make it impossible to discuss the canon of the 2003 series.
Getting back into spin-offs again, let's look at the series Isekai Quartet. This is a comedic take on several Isekai series (namely, KonoSuba, Re:Zero, Overlord, and The Saga of Tanya the Evil). While I haven't actually looked up whether the license holders have put out any statements, we can guess that Isekai Quartet is non-canonical to all four series. The absurd events therein are merely for the sake of comedy, and the tone clashes with the events in the main stories of each.
Such crossovers are often non-canonical (or at least of very dubious canon status). I recall, for instance, in the Star Wars crossover episode of Phineas and Ferb, Phineas does a meta-commentary and says something like, "Don't worry, it's all non-canon, so just have fun!"
Looking at a similar example, Nyoron! Churuya-san is a spin-off manga/anime series of the Haruhi Suzumiya franchise. It is a series of short comedic sketches with chibi style characters (as in Isekai Quartet. This type of work can often be easily labeled as non-canon to the main work. Indeed, the characters in Nyoron! Churuya-san act out of character, and other elements are quite absurd and strange and don't really fit into the framework of the main story, but are rather played up for comedy.
Not all such spin-offs/sidestories can necessarily be offhandedly dismissed as non-canonical, however. If the events can fit into the main story, sometimes all you can say is "maybe it's canonical" or "maybe it's not", using your best judgement. Chibi character designs, a heavy focus on comedy and/or parody, and meta-humor are often giveaways to the events being non-canonical (but again, this isn't true for all cases). For example, the events of Love, Chunibyo & Other Delusions! Lite are usually not so over-the-top that they couldn't exist in the actual canon. The self-referential parts of the shorts for the Chunibyo movies, however (the characters tell the audience to take a picture), certainly does lead one to suspect these particular shorts are non-canon. (Sidenote: these shorts aren't chibi-styled, but I was struggling to find a better example).
Headcanon
Which brings us to another important term: headcanon. From https://www.merriam-webster.com/words-at-play/words-were-watching-headcanon-fanon:

Headcanon generally refers to ideas held by fans of series that are not explicitly supported by sanctioned text or other media. Fans maintain the ideas in their heads, outside of the accepted canon.

Headcanon is the canon you personally accept for a story, and has nothing to do with the license holders. To use an extreme example: if you really liked a fanfiction you read, you might decide that's part of your headcanon. This type of canon can be useful for your personal enjoyment of a series, in order to fill gaps or ambiguities in the story (for example, if the story ends without love triangles being resolved), but should not be used when debating aspects of the story with others. Since everyone will likely have their own headcanon, the actual canon (as decided by the license holders) is useful for having common ground to discuss a story with other people.
Word of God
Another phrase one should be aware of with regards to canon is "Word of God". Urban Dictionary defines it as follows:

A statement regarding some ambiguous or undefined aspect of a work, the Word of God comes from someone considered to be the ultimate authority, such as the creator, director, writer or producer of a TV show / video game / film / etc.

In other words, Word of God is usually when the author of a manga makes statements about their work outside of the story. It doesn't necessarily have to be outside of the manga itself. Oda's SBS corners in One Piece come to mind.
As some other answers state, the canon is often determined as what the license holder decides is canon. In other words, Word of God decides what is canon.
I personally don't subscribe to the notion of Word of God as being authoritative, instead preferring the text of a work to be the primary authority, superseding random statements by the author. Most people do subscribe to the Word of God, however, which is why when I write answers on this site, for instance, I try to find such statements and use them when available.
Wrap Up
Others define canon as what the license holders decide is part of the story. That's correct, but only really a useful definition if the license holders are actually putting out statements on what is canonical (and to me, this definition belies how the term canonical is typically used in conversation). Granted, there are some franchises for which license holders have historically been very particular and diligent (Star Wars comes to mind, which currently has different canon categorizations for works. See also my question here.). This definition also seems insufficient for an answer to this question, particularly since what is wanted is an easy to understand explanation of canon, with particular attention to how it relates to anime. This is why I have given particular attention to topics such as filler episodes and how stories may vary across the different mediums (anime, manga, light novel), and provided several examples.
Addendum (More Examples)
With the case of Love, Chunibyo & Other Delusions!, there are some further interesting points with regard to canon. Namely, that several of the characters are anime exclusive (see this question). These characters go beyond mere filler characters: the story of the light novels has been rewritten to a very large degree to incorporate these characters. These characters form such an important part of the anime, I'd say it doesn't really make sense to refer to events of the anime as being non-canonical; rather, the anime and light novels each have their own canon.
Perhaps a better example of comedic skits being unable to offhandedly be dismissed as non-canon are the 4-Koma comics that occasionally appear in A Certain Scientific Railgun. There is, for instance, one in volume 7 where Kuroko has a plush doll and body pillow of her Oneesama. Though the tone is undoubtedly comical, Uiharu and Kuroko don't act terribly out of character here, and it's possible that some version of this conversation could actually be canonical. It would likely depend on whether or not Kuroko has some means of obtaining products with Mikoto Misaka's face on them. My favorite 4-Koma in volume 7 would have to be A Certain Misaka's No Work. This one actually tacks additional lines onto a conversation in the manga proper. One could easily imagine Misaka 10032's proclamation of "Working is for suckers" being canonical, but simply left out of the main story so as to not destroy the tone of the scene. For such an instance of an event being omitted from a scene for the sake of tone, see the last two pictures on my answer here for a Fruits Basket question. And regardless of whether Misaka's statements in this 4-Koma are literally canon, they are definitely part of my headcanon.
Further Reading
If interested in learning more, I recommend perusing the Wikipedia article and this Dragon Ball Wiki article.

What does the word canon mean and how does it refer to anime or manga?

Merriam-Webster can help.  Specifically, definition #3b:

3 [Middle English, from Late Latin, from Latin, standard]
a: an authoritative list of books accepted as Holy Scripture
b: the authentic works of a writer

the Chaucer canon

c: a sanctioned or accepted group or body of related works

the canon of great literature

Thus, if the author or creator writes something in a published(1) story, it's canon.
This is subtly different from Word of God, which are statements made by the creator(s)/writer(s) that clarify or override canon.
(1) This does not only mean printed.  TV shows, movies, etc are all included in this definition.

In layman's terms, "canon" refers to the original storyline regardless of the author/producer/etc.
For example, the Halloween series of movies. The entire Halloween series revolves around Michael Meyers going on insane killing sprees.
Halloween 3 has absolutely nothing to do with the rest of the series. Not even a mention of Michael Meyers. Hence, Halloween 3 is not canon to the Halloween series.

you're on an anime/manga site and you're using an example that has nothing to do with anime/manga? why?

@starball the word "canon" isn't specific to anime.

H3 is part of the Halloween series.  Thus you must give Word of God citation why it's not canon.  Otherwise, it's not canon.

@RonJohn yes, I know. read what I wrote again. I give a particular reason that your reply has little to do with.

@starball one does not need to know any anime to be able to explain what canon means.  (Of course, the fact that this is anime.SE is why -- since I don't know anime -- I didn't give any examples of canon vs non-canon.)

"Otherwise, it is canon."  Sorry for the earlier typo.


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Can a Rasengan user amplify their Rasengan with a Shinobi Gauntlet Scientific Ninja Tool?
If I recall correctly, Naruto and Boruto combined their Rasengans in an attack. How about if a ninja who can do the Rasengan uses a shinobi gauntlet? Can he power up his own Rasengan by using this tool?

I'm assuming you're asking if one creates a Rasengan with a Scientific Ninja Tool, can they amplify it with their own chakra?
Well, before I answer the question, let's start with the facts.

First off, as stated by Konohamaru Sarutobi, jutsu casted by the Scientific Ninja Tool is not tied to ones own chakra, and thus can easily go astray and cause mass destruction.

Secondly, the Scientific Ninja Tools are a work in progress and more variants of it continue to be invented, as shown by Ao when he utilized the chakra saber.

Third, jutsu can only synchronize when the two casters are on the same chakra level, as shown when Sasuke matched up to Naruto's chakra level using the Sharingan during the Fourth Great Ninja War to make an Inferno Style Rasen-Shuriken.

There are actually multiple answers to your question, completely depending on the situation at hand.

 Minato once stated that when similar chakra signatures try to use a jutsu together, the chakra synchronizes and forms the ultimate technique. (in Naruto Shippūden the Movie: The Lost Tower)

If you seal your own Rasengan into the Ninja Tool Scroll, cast it, and try to amplify it with your own chakra, this could possibly work. However, this is most likely because the same chakra are attempting the same jutsu.
Let's assume one with uncontrollable chakra started a Rasengan and sealed it into a Ninja Tool Scroll. Then an entirely different person with "calmer" chakra uses the Ninja Tool and tries to amplify this Rasengan. This most likely would not work. First of all, the chakra is not tied to him, and also isn't similar in any way, shape, or form. The Rasengan most likely wouldn't have been amplified and completely release and explode. It always depends on the situation at hand.
One would most likely be able to strengthen their Rasengan if the chakra is similar, but remember, if the chakra is different and lightly tied to the casters influence, this most likely would not work. We can only assume this based off the current facts given on Scientific Ninja Tools.

For more information on the Scientific Ninja Tool, please check out these
links:
Naruto wiki article on the Shinobi Gauntlet
Naruto wiki artice on Scientific Ninja Tools


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Can the Kirisame no Jutsu extinguish the flames of Amaterasu?
In Naruto Shippuden episode 147, a technique used by the ANBU forces of Kirigakure called Kirisame no Jutsu made rain fall down that absorbed chakra, and dissolved Naruto's Rasengan,  Utakata's Soap Bubble Ninjutsu and Sai's Ninpo: Choju Giga. Considering Amaterasu can't be extinguished with water, but this water absorbs chakra and other people's techniques, can the Kirisame no Jutsu technique extinguish the flames of the Amaterasu?

Going purely based of theory, any technique capable of absorbing chakra can ideally extinguish the Amaterasu cause the jutsu itself is a form of chakra. I tend to skip fillers so have no idea but one thing i can say tho is it might depend on the rate of absorption compared to how much of the flames burn out the water i guess

As @Rumpelstiltskin mentioned in the comments,

any technique capable of absorbing chakra can ideally extinguish the Amaterasu cause the jutsu itself is a form of chakra.

Amaterasu can practically only be stopped, if one, sealed, as Jiraiya did. Or, if absorbed. It will also extinguish if it passes its time limit of seven days and seven nights.

Amaterasu cannot be extinguished but sealed.

Taken from Quora page: What would Jiraiya do if Amaterasu hit him?
And, Amaterasu can also be defeated by absorbing jutsu, as Madara has shown when Sasuke cast Amaterasu on him. Although most of the flames were concentrated to his armor, he managed to remove it by taking his armor off and absorbing the rest of the Amaterasu with the Rinnegan's Preta Path.
The wiki also explains that:

The Preta Path (餓鬼道, Gakidō) grants the user the ability to absorb chakra in any form. ... This ability is primarily defensive in nature as it is capable of absorbing chakra from an individual through physical contact. (emphasis my own)

Any jutsu that can absorb jutsu ideally can absorb jutsu / dissolve any justu should be able to absorb Amaterasu, whether the technique used to dissolve the jutsu is made of water would not be much of relevance, as it can still absorb jutsu. Thus, it is likely that the Secret Technique: Mist Rain can absorb/dissolve Amaterasu.
But as @Makoto mentioned in his own answer, this jutsu has never been applied to Amaterasu canonically, but in theory this should be possible.

Sources:

What would Jiraiya do if Amaterasu hit him?

Naruto wiki article on Preta Path

Naruto wiki article on Secret Technique: Mist Rain

I believe there are other methods of tackling Ametarasu apart from Preta path. You can use Shinra Tensei to push away the flame, use Kamui to transfer the flame to other TS dimension or be a jinchuriki (they are unaffected by Ametarasu). I also think Jiraiya knew a fire sealing technique to seal Ametarasu.

@FumikageTokoyami That is true, thanks for the additional info!

This is unknown.  This jutsu has never canonically been applied against Amaterasu, so there is no way to either affirm or rebut claims on either side.


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Why could Sai perform Ninja Art: Super Beast Scroll if he had no emotions?
In Boruto, we figure out that losing passion towards art will make you lose the ability to perform Ninja Art: Super Beast Scroll.However, Sai had completely suppressed all emotions when he came out of the Foundation.
So, how was he able to use this jutsu? I think passion is also an emotion.

From wiki:

In the anime, for the drawings to retain stability upon emerging, the user's emotional state must have a true passion for them (art). Otherwise, the drawings will immediately splatter.

It is true that Sai didn't had emotions or FWIW, he suppressed them but he didn't lose his passion for art. In fact, it was the one thing he held onto from his early childhood with his brother until the present. His passion for art is what gives him the ability to use the Super Beast Scroll jutsu.

Did you just copy pasted from quora? My point is passion is also an emotion. So if he had  passion, he had emotions.

@BhavyaGupta I think the point he's trying to make is that while the Foundation teaches the complete erase of your emotions, Sai had held on to his passion to draw/write, and if you consider passion an emotion, then no, he didn't erase all of them. His passion to draw was critical for his jutsu and thus he did not erase it. And he would've used a blockquote (as he did when he quoted the wiki) if he had copied and pasted from Quora.

@Bhavya 1. Passion and emotions might go hand-in-hand but they are two different things. 2. I might have copied some sentences from Quora because the wordings is what I was looking for (I would have wrote the same thing tbh) but I didn't copied the entire thing and blockquoted and thus I didn't referenced it "from Quora". 3. If you looked it up yourself and found that Quora article, why did you went through the trouble of asking here? If you got the answer from there, you should have self-answer it.

If you are not satisfied with the answer, I can delete it.

@FumikageTokoyami Your answer is now accepted, I'd assume he'd be satisfied with it. What I think confused him is thinking that passion is an emotion. Good answer tho, +1


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Is it possible for someone to clone Itachi Uchiha?
Recently, in Boruto, we found out that Koji Kashin of The Kara is a clone of Jiraiya, created by Amado to kill Jigen. But, is it possible to create a clone of Itachi Uchiha?
Amado used the DNA from Jiraiya’s severed arm, which had been ripped off by Pain before the rest of the body was thrown into the sea to clone him. It was never explained what was done with Jiraiya’s arm, and Kabuto could not find it during the war. But perhaps Amado had come to the place first and collected the arm before anyone else came looking for it.

This answer and question is mostly speculative, but it should be able to get answered based off what has been revealed in the plot.

One fact that should be certain is:

Ideally, any character in the Naruto/Boruto universe should be able to be cloned, provided that he or she who wants to duplicate that person has access to that persons DNA. This follows the same principle as Summoning: Impure World Reincarnation, minus the body sacrifice that the jutsu requires.

Considering the above, one should be able to clone any character in Naruto as long as they have access to their DNA. Kabuto explained:

The above manga panel explains all that is needed to bring someone back via Edo Tensei is the person who is being resurrected DNA. As long as anyone can access Itachi's DNA, they should be able to clone him for whatever purpose they need to.

(Again, this is speculative, because the question is speculative in a way, but can be answered based off of what is revealed in the plot and facts given throughout the series.)

a shorter answer would be, one should be able to clone itachi for whatever reason provided they have access to his dna

If we consider only NS, then yes. Itachi was reincarnated using Edo tensei (cc @Sayed).

@ᴅᴀɴɪᴇʟ cool, maybe we will see itachi again in boruto, they can also get DNA by time travel as it was done before by Sasuke and boruto...

@FumikageTokoyami yeah, practically anyone should be able to provided that they have access to the dna of one who wants to clone. im not entirely sure what things carry itachi's dna, but as long as you find his he can be cloned

I have added an answer elaborating OP's second para and explained why Kabuto couldn't find Jiraiya's arm and the reason behind Jiraiya not getting resurrected in final arc of NS.

@SayedMohdAli yeyeye, would've been super cool for adult sasuke to run into itachi, even tho that arc was a filler

@ᴅᴀɴɪᴇʟ yup, it will be cooler if Itachi teaches something to Sarada, we know Sasuke character and I believe he does not disclose anything about Itachi to his family.

Although the main question is answered by @Daniel, I want to highlight and elaborate the second para of OP's question.

Amado used the DNA from Jiraiya’s severed arm, which had been ripped off by Pain before the rest of the body was thrown into the sea to clone him. It was never explained what was done with Jiraiya’s arm, and Kabuto could not find it during the war. But perhaps Amado had come to the place first and collected the arm before anyone else came looking for it.

Yes, it is true that Jiraiya wasn't revived in the final arc of NS by Kabuto through Edo Tensei and the reason for that is quite different in anime and manga. In Masashi Kishimoto's original story in manga, Kabuto claims that he could get a big enough sample of Jiraiya's DNA to reanimate him, but Obito says not to push his luck. However, in the anime, Kabuto simply says that he can't reanimate Jiraiya because his body is at the bottom of the sea. Considering all the other powerful ninja Kabuto brings back, this is a weak excuse, especially since he can go through great lengths to bring back DNA of dead ninjas. The real reason Jiraiya isn't reanimated is to protect the integrity of the character's emotional final scenes in NS. But if we consider the context of the narrative, his omission in the final war is certainly odd.
Now, the absence is somewhat explained in Boruto. Kashin Koji is thought to be a clone of Jiraiya because Kara were heavily involved in genetic manipulation and the concept of clones is already known in Boruto i.e. Shin. So, Kara might have took the severed arm of Jiraiya for themselves leaving Kabuto with nothing to work with. Kara have been operating in secret for years, and they were artificially creating ninjas appears to be their chief recruitment method. Even if Kabuto did manage to get some DNA, he cannot ressurect him because Kashin Koji was already a clone of him and the rule of Edo Tensei is that the body must be dead in the first place in order to get reanimated.
Source: https://screenrant.com/boruto-naruto-jiraiya-reanimation-plot-hole-kashin-koji/

I believe many people do not know about this plot hole, nice information.

this is great answer for why Kabuto didn't resurrect Jiraiya in the great ninja war.


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What is the reason that Satoru Gojo still makes hand signs to activate the Infinity when he made it automatic?
Gojo is really powerful, and one of the techniques that greatly put this statement into play are his Limitless and Infinity Jujutsu techniques. Taken from the wiki article on Limitless:

Limitless (無下限, Mukagen?) is an inherited technique passed down within the Gojo Family. This technique brings the concept of "Infinity" into reality, allowing the user to manipulate and distort space at will.

The technique (infinity) was originally manually activated by Gojo, but after his defeat against Toji during his Past Arc, he started training and made the Infinity an automatic technique, by mass, speed, shape, and cursed energy amount:

Gojo says the technique is automatic now, but there are instances (present in both anime and manga) where he makes a hand sign to activate the Infinity:

Leading to this question.. what is the reason that Gojo uses a hand seal when using Infinity when he made it an automatic techniques years ago, as a teen?

I'm guessing It could be the equivalent of anime characters shouting out move names right before attack. The mangaka might be attempting to explicitly show us "the readers" when he actively uses the ability. I can imagine the scene wouldn't be the same if Gojo was just standing and doing nothing while the curses are completely immobilized.

Just like @Rumpelstiltskin said, it's because it's supposed to act as an indicator that he is using his powers, and also to add more flair into the show.
Considering that it's a show which revolves around action and fighting, even if he is dubbed as the 'strongest' he still has to do something to arouse the viewers' interest. It can't possibly be considered a fight if Gojo does practically nothing, as it will make the fight seem too one-sided. As shown in the episode when they met Nobara, Yuji could be seen hugging Gojo out of happiness. It wasn't shown when Gojo actually deactivated Infinity to allow Yuji to do such a thing, which further proves this point. Infinity is something that is somewhat transparent and we can't see it, so we don't actually know when it is activated and when it is not. Gojo doing this hand signal thus helps us to know that he is currently activating Infinity and the attacks being stopped are not due to other causes.
Of course, another theory is that he did this because he is used to constantly doing it as a teenager, but I find the first theory more plausible.

upd. as stated in ch. 223, sorcerer's prowess is measured in their ability to omit certain rituals while being able to fully activate their technique, but actually using all of those otherwise unnecessary rituals will allow them to output more than 100% effectiveness of that ability


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Why wasn't Kaguya able to tell the difference between Naruto's clone and the original? Ep: 472 Naruto Shippuden
In Episode 472 of Naruto Shippuden, Kaguya and Black Zetsu thought Naruto with Truth Seeking Orbs surrounding was the original among the clones, but it turned out to be a clone once Kaguya struck him with one of her black Rods.
Why couldn't Kaguya use her Byakugan to see the original Naruto? Byakugan can see the real ones among clones and I don't think anyone has  a stronger Byakugan than Kaguya, right?
And if Naruto had Nature Energy and couldn't be seen- so does Kaguya, she can merge into nature and kill enemies by merging into nature as per Epsiode 470, when she teleports everyone into Ice World and turns into Nature Energy and traps Naruto under icicles.

This is because the Byakugan can't distinguish the clones from the original when a jutsu like Shadow Clone is used. Had it been the basic Clone Justu, then she would have easily been able to distinguish the clone from the original.

The Byakugan can see chakra to a greater degree than the Sharingan. This enables users to distinguish certain types of clones from their original and even identify specific individuals' chakra signatures
Source, empasis my own

Neji states during the Chunnin exams that the Byakugan is not able to distinguish the real one amongst the shadow clones due to 1) the chakra signature is the same and 2) the charka is evenly distributed through the caster and the clones

and I also remember Neji having a hard time distinguishing White Zetsu clones.


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How did Orochimaru use Triple Rashomon with his hands sealed?
Orochimaru got his hands sealed when he was fighting against Hiruzen Sarutobi. He got his hands back much later during the war. But when he was fighting 4 tails Naruto at the beginning of Shippuden, he summoned three Rashomon. At that time he still didn't have his hands, so how did he manage to do that?

After Hiruzen used the Reaper Death Seal, Orochimaru arms were immobilized and was unable to do anything with them (ie, perform justu). As a result, Orochimaru was forced to find a new host for his soul due to his current host's condition progressively got worse.
Transferring his soul into a new host cured the physical ailments of Orochimaru's conditions. While his soul was still damaged spiritually, he could at least perform justus that did not require hand seals.

Though the act undid most of the damage caused by the Dead Demon Consuming Seal, it still left Orochimaru incapable of using techniques requiring hand seals.
(emphasis my own)

Summoning justu does not require hand seals. Instead, summoning only requires a blood sacrifice and summoning seal.

Something to note is that the default Summoning jutsu does require multiple hand seals.


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Why didn't Naruto's Rasengan turn red when he got Kurama's one-tailed cloak against Sasuke?
During the battle between Naruto and Sasuke in the original series, Naruto got one tails cloak from Kurama. That means he could use Kurama's red chakra. When Naruto uses his regular chakra of blue colour, his rasengan looks blue. But it didn't turn red when he had one tails cloak. Why?

While reviewing the fight scene, I'd like to point out something that I noticed.
Towards the beginning of Naruto and Sasuke's battle, Naruto's Rasengan was its normal blue color, as shown here. This occurrence was prior to Naruto gaining the 9 Tails Cloak.

Towards the end of the battle, while Naruto's Rasengan was forming, I noticed that this ones color was actually more of a purple color than the normal blue (albeit not red either). This is shown here

Purple is a combination of the colors Blue and Red. So with that information, we can deduce that the chakra used to perform Naruto's final Rasengan was a mixture of Naruto's blue chakra and Kurama's red chakra.

i think he formed the rasengan before wards he was in the 1 tail form than used it in the end the last rasengan was purple which looks like a tailed beast bomb in the form of a rasengan which naruto formed when he was trying to make a tailed beast bomb when he was in the chakra cloak of 9 tails so there is a possibility that the blue rasengan was formed before the 1 tail form was activated but a tailed beast bomb like man thats so good

Please include relevant sources/references to support your answer.


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Why does Inosuke have a girly face?
Inosuke of Kimetsu no Yaiba has a distinctive girly face for which he wears a boar mask to hide his face and avoid embarrassment. My question is: "why does he has a girly face in the first place?" He has a clear male voice and a male body, so why does he have a girl's face?

Why not? There are boys like that in real life here in Japan and everywhere else. The opposite is also true - girls with boyish faces.

Inosuke is not the first nor the last anime character you'll encounter with a feminine-like face despite being biologically male.

There is no explanation in the manga about his face being girly. We saw his mother and her face is beautiful, but we never see his father. In anime and manga, you can see lots of girly-faced characters.
Basically, the mangaka wanted to make an interesting character, that's all. After some time, you get used to his face and it does look less girly. I started to notice again that his face looked girly after I saw your post.


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When does someone receive the Kāma seal?
Is Kāma in Boruto granted to someone by an Ōtsutsuki's own will? Or will someone who killed an Ōtsutsuki be granted automatically?
For the case of Jigen and Kawaki, it is mentioned in some sources that they are considered as a "vessel". While for Boruto it's because of killing Momoshiki Ōtsutsuki.
Does it mean that Momoshiki Ōtsutsuki gave his power to Boruto by his own will? When did it happen that Momoshiki agreed to give Boruto his power? Or it was granted automatically after Momoshiki was defeated?
If it is because of the latter, in episode 135 of Boruto, does it mean Boruto or Naruto will inherit Urashiki's chakra too since they were able to defeat him?
P.S. I'm not reading the manga.

Note: Urashiki is a filler character. Nobody will get a Karma seal from him.

Kāma attribution is not automatic, but a conscious act from an Otsutsuki.
As of now, including the Boruto manga, we have been able to observe 3 different Kāmas which I will try to explain without spoiling the scenario. Be aware, however, that for the 3rd Kāma, I will delve into spoiler territory as I will need to talk about a character which has not been shown yet in the Boruto anime.

Boruto : Momoshiki implanted the Kāma on his hand by projecting his soul and chakra, and willingly marking him as a Kāma vessel.
Kawaki : A teenager who has been extensively experimented upon by Jigen and his cronies. Kawaki received a copy of Jigen's very own Kāma through scientific means and chakra transfer, which is a completely intentional transfer.

Jigen :

3. Jigen : A man of unknown origins. His Kāma (identical to Kawaki's) stems from Isshiki Otsutsuki, Kaguya Otsutsuki's consort. He is a perfect vessel, meaning his personality has now been definitely erased by Isshiki and solely houses the Otsutsuki. Isshiki seeks Kawaki's body because he also is a perfect vessel.

The word "vessel" is crucial, because the main purpose of the Kāma is to create a literal vessel for the Otsutsuki soul which created the Kāma (as confirmed by Jigen himself). It is unconfirmed for now, but Momoshiki could try to take-over Boruto's body later on. We know that Otsutsukis can reincarnate after death, or at the very least transmit their power to individuals they are related to : Naruto and Sasuke were the "transmigrants" of Ashura and Indra, semi-reincarnations influenced by their ancestors. The Kāma bonded Boruto to Momoshiki in death like Ashura and Indra are linked to Naruto and Sasuke by blood.
Tl;dr Kāmas are granted by Otsutsukis who need to hijack a new body


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Why didn't Uchiha Itachi get himself the Eternal Mangekyo Sharingan?
To make an Eternal Mangekyo Sharingan, you need to transplant another Mangekyo Sharingan, right?
Itachi had awakened his Mangekyo Sharingan when Shisui died, and Shisui had gave his eye to Itachi.  So why didn't he transplant that eye and make his Mangekyo Sharingan eternal?

To make an Eternal Mangekyo Sharingan, you need to transplant another Mangekyo Sharingan, right?, no, just transplation is not enough, should be the person with strong blood ties ideally a sibling

To add to this question, Itachi was the main actor in the Uchiha clan massacre. In fact, it has him who killed his own parents. Instead of Sasuke, couldn't he implant his parents' instead?

There could be a couple reasons: Two plausible ones were mentioned by Makoto. As we all know, the Sharingan is a pair Dojutsu and so one would need 2 Mangekyou together in order to awaken the Eternal Mangekyou in both of their eyes. The other reason was also stated by Makoto, is because it has been mentioned that the 2 individuals must be related by blood and it makes sense since the only 2 people who have actually ever done this were Sasuke and Madara and they used the Mangekyou's of their siblings.

As for the reason why he did not use his father's Mangekyou, it could be because Itachi knew that he was dying and saw no point in achieving Eternal Mangekyou, just to die to an incurable sickness. He probably knew he wouldn't have enough time to reap the benefits of the Eternal Mangekyou. For more info on his sickness check out this thread; was it ever stated if Itachi was already dying?
The last reason is what I would call "an overwhelming level of Love mixed in with a strong guilty conscience". Itachi wiped out his entire clan to protect Konoha from the coup that the Uchiha were planning, but couldn't kill his brother because he loved him more than everything else. Itachi most definitely knew how terrible his acts were and right from that moment planned to make amends for it  by dying at the hands of his kid brother, who would try to avenge the entire clan. Itachi most likely also concluded that Sasuke would have had no chance against him if he had the Eternal Mangekyou, and therefore decided to really fight his younger brother later on after his eyes had deteriorated in such a manner that they would be close in strength and not a one sided battle.

So it was actually because of Sasuke! He knew he was dying and preferred to die at his brothers hand. By doing that, he used his death to make Sasuke stronger. In order to make the fight a bit fair, Itachi decided to let Sasuke have the upper hand (by fighting him while he was partially blind and sick).

And yet the stupid little brother failed to defeat the partially blind and sick older brother who intentionally hold back in improving his powers.... Sorry couldn't keep my self from writing it! Awesome answer though! thanks :)

Danzo had stolen one of his eyes before Shisui could have given it to Itachi.  An Eternal Mangekyo Sharingan has never been created with just one eye; it has always been pairs of eyes.
Also, one other condition for the Eternal Mangekyo Sharingan is that there has to be very strong blood ties between two people.  Itachi and Shisui are both cousins at best, so the blood tie is weaker than between Itachi and Sasuke, for instance.  It would be unlikely that an Eternal Mangekyo would have formed from Shisui's single eye.

Eternal Mangekyou only requires spare eyes. However, to obtain the Mangekyou you need to be attached to someone, like a sibling/close friend (this explains why Obito never lost his vision and why Kakashi was able to use the perfect sussano).
Itachi didn't get the eternal mangekyou because he just didn't want to. He did not want to take his father's/anyone else's eyes, because maybe he felt very guilty.

The existing answers are incorrect. You cannot get an Eternal Mangekyo Sharingan just by changing to any other pair of eyes, you can only do so if those eyes are from a brother (blood related). This was precisely explained.

Please include relevant sources/references to support your answer.