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Why does the Death Note never run out of pages?
It is kind of intriguing the Death Note never runs out of pages...

How to Use: XXXI
The number of pages of the Death Note will never run out.

Source
Since it's made of an unknown matter it's not really that difficult to believe, but we didn't really see the effects of this rule in the anime, which I guess could be more important than most of the rules (unless you show me some other point of view in the answers), by analyzing:
The thickness of the Note should increase:
By assuming that the number of pages will increase every time you use the Note pages to make it endless, we would clearly see that the Death Note will get thicker, since the number of pages is rising, and we would clearly see that the Note of Light would be too thick after his long years using it.
The already written pages remains:
We could also deduce that the pages that are already filled do not disappear since both L and Near did analyze the names written on the Notes and the names of the dead victims as another evidence of the conviction.
Now as a question:
We know that the user can rip some pages from the Note to use them later, now what would happen if the user rips all the pages from the last one filled to the end cover of the Note for using them later? :

Will it be judged as destroying the Note?
Will it be judged as ripping some pages?

If 1), the Note will be rendered useless.
If 2), would other pages appear in the Note? In case they appear, could the user keep ripping off pages and giving them to hundreds of people making Kira everywhere? Why didn't Yagami Light do such a thing as becoming the master of the page users and the only one knowing their names in case they disobey him, and as a result, creating an army for himself made of the Kira fans?

Check also: Why is there an entire Death Note if only one page is enough?

IT's Magic!!!!!

It is also interesting to think about if it is possible to write names over the one's that were already written and died. Or the use of a pencil and eraser, would mean the user could go on writing names for a very long time.

Yes actually as you mentioned, I'll add a question about erasing names to clear pages..

@TechSupport You could ask that as a separate question. The only rule regarding erasing the names is that doing so won't bring back the killed person (The manga pilot had a death eraser though), but there's nothing preventing the user from rubbing to reuse the page. For that matter, you could overwrite on the pages, because there's no rule against that!

ok I guess I'll ask it in separate question so it can be easy to find when searching on google or something.

I recently revisited this question and was rewatch the anime just now when it struck me. In episode 33 (just before the rules in the middle of the episode) X-Kira recives the order to rip out pages of the death note and immediately does so and rips out the last pages of the book. He was writing names in it before and we do not see him turn over any pages. On the other hand, he was ordered to send emty pages but had allready been writing on the right page and he had to do executions for several more days. What do you make of this? Is it worth a new question?

Since there are multiple questions, I will divide the answer also into multiple sections.
Why doesn't the thickness of the Death Note increase?
The rule quoted in the question seems to contradict a statement that Sidoh makes in one manga chapter. He says that to get his Death Note back, he has to wait until the current owner dies or till the all the pages are filled up. Since both the manga and the How to Read sections are canon, I would call this an author mistake. However, an interpretation is possible wherein both statements could be correct, without causing contradiction. Let us consider the three cases.

How to Read version of the rule is correct.
If the pages in the Death Note never run out, we can assume that new pages will grow somehow once all pages have been used up. The most plausible explanation for why the book doesn't become thick is that Light tore away and destroyed some or all old pages after the new pages grew.
L or Near only verified that the people whose names were then present in the Death Note had indeed been killed. They did not, and could not, verify that there were other people killed whose names are not in the Death Note.
Sidoh's statement in manga is correct.
In the manga pilot, the Death Note consisted of 60 pages with 38 lines per page. Once you ran out of space, you could ask your Shinigami for a new one.1 The pilot chapter is usually considered non-canon, but it is possible that the authors planned for the Death Note in the manga to behave similarly and simply forgot about it when they wrote the How to Read.
Both versions are correct.
We could interpret the statements as the following. When Sidoh said that the Death Note's pages are filled up, he was referring to the physical Death Note. The How to Read section refers to the logical or conceptual Death Note. The new notebook that the Shinigami gives could be seen as the "continuation" of the earlier book. Since there's no limit to the number of times you can ask the Shinigami for a new book, the pages never run out logically.

How is tearing the last page interpreted?
This is an easy one, since a torn page from the Death Note is still technically a part of the same Death Note. This can be seen from the following canon events, both of which Light puts to good use for his plan.

Someone touching the torn piece will see the Shinigami associated with that Death Note.
Someone who has lost memories of the Death Note, will remember them, after touching that torn piece.

This implies that until that last page is filled up, the book is still considered to be not filled up.
Could Light rip-off pages and distribute them to create a Kira army?
Technically, he could do it, but there are a number of reasons this would not be a good idea.

From the explanations in the first two sections, it follows that unless all pages are used up, Light won't be getting any more pages. (Until all pages are filled up, new pages won't grow, or the Shinigami won't give you a new book, depending on which version is correct.)
Distributing the Death Note pages increases Kira's chances of getting caught. Even if he chooses people with a "high sense of justice" as he wants, not many would be as smart or careful as him in covering their tracks. There's a good chance someone would spill the beans, over a glass of alcohol, for example. Moreover, if the pages fall into the hands of Police, they could serve as evidence, which would eventually be backtracked to him.
Even if Light has their names and faces, he cannot possibly keep track on their every activity, and killing them after they have committed a mistake would not help him much. In particular, note that:

 what eventually contributed to Light getting caught was Teru Mikami acting on his own, without waiting for Light's orders.

1 Death Note Manga Pilot, Chapter 0, page 26.

IIRC in the anime, Ryuk had asked for an extra one to dump into earth. Which implies he can have only two at any time.

While it's definitely vague, it could be assumed that the Death Note rule about Infinite pages only applies to Death notes in Possession of a Death God (i.e., full pages simply disappear and are replaced with new at the end of the book, since Death God's have no real reason why they need to keep the pages), where as Death Notes in possession of Humans have a finite number of pages (as is specifically stated by a Death God), but can be erased and reused as needed (If they think to do so before the pages are all used up).
Which is really the only way IMO that Near's trick could've worked.

Some rules have been changed in How to Read from what was mentioned in the manga. For instance, Sidoh states in the manga that for him to get his notebook back, he would have to wait for the owner to die or use up all of the pages, whereas in How to Read, it is stated that there are an unlimited amount of pages in the Death Note. In contrast, the rules listed in the manga pilot chapter, included in How to Read, state that the notebook has 60 pages with 38 lines per page, and that when the owner runs out of space to write in the notebook, they "may ask the original Shinigami owner for another."

Well in the pilot manga, it states,

There is 60 pages and 36 lines on each page, if you write small you can write as many names as you want.

Meaning eventually it would run out. But! It also says you can ask the shinigami for a new Death Note. However, this doesn't happen in the anime, meaning the pages must regenerate, somehow.


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How did the villagers know about Naruto being the Kyuubi's jinchuriki?
I know that the villagers of Konoha were afraid of the Kyuubi because of its rampage on the village, and that the Fourth Hokage saved the village by sealing it inside Naruto. Based on this answer, the Third Hokage hid his identity to protect him.
Did the Third Hokage hide only Naruto's relation with the Fourth, or also him being the Kyuubi jinchuriki? If so, did the villagers find out because Naruto went out of control with the Kyuubi's chakra?
Edit:
To make clear what I am exactly curious about.
Why didn't they also hide Naruto's identity as a jinchuriki so the villagers will not hate him?

I think that both the 3rd and 4th Hokages were naive, foolish and too blinded by their love for the village and its people, as well as their own idealism. They are both hokage they should have realised that realisticly naruto was never going to be seen as a hero by the villagers. Think about it after suffering a massive attack it was obvious that the villagers would be clouded by their anger and grief over the losd of their loved ones to the 9 tails. Anyone who feels these emotions would take these feelings out on others, the hokages made naruto the scapegoat for their abuse.

Don't take me wrong i personally like the both of them, they are kind and comoassionate, but that is their flaws their determination to see goodness in people was their undoing and were both taken advantage of. They wanted to believe that the village is good, but that is not the case in this instance. They both should have known this would happen as hokage its their job to know what the village is thinking and what their response will be to their decisions.

A mere sorry by the Minato to Naruto should not just be able to make up for his poor decision that he and the 3rd made that cost naruto happiness. If he really loved naruto then he shouldn't have told the village the truth about the 9 tails thus sparing naruto the scorn he received during his life growing up. After all naruto's mother and lady Mito status as jinchuriki were secret for that very reason.

The villagers know that Naruto is the Kyuubi's Jinchuriki because Sarutobi Hiruzen told them!
Here's why: In one of the earliest chapters, Hiruzen tells Iruka that the Fourth Hokage had died hoping the villagers would see Naruto as a hero, who sealed the Kyuubi. The only way Hiruzen could make it happen is by telling the villagers that Naruto was the kid that the Fourth Hokage sealed the Kyuubi into.
However, he decided not to reveal Naruto's relation to the Fourth Hokage. Note also that Kushina's pregnancy was a highly classified information, known only to Hiruzen, Biwako, Minato, a few ANBU members and some others. Hiruzen could have made up a story that Naruto was a random kid that Minato picked to seal the Kyuubi (or something like that), and few would have suspected or questioned him.
PS: A little plot hole there is that on growing up, Naruto's close resemblance to Minato, along with the Kyuubi story, should have raised a few eyebrows, but Kishimoto probably decided it was not important enough for the "plot" to require an explanation.

The knowledge of Naruto being the Kyubii's host was limited to the older generation, not all from naruto's generation knew about it. Sakura came to know about it only during the earlier episodes of shippuden. How and why the older generation knows may be assumed from the fact that they were present on the day the kyubii was sealed. So they might have got an explanation on how the danger was averted, but for the safety of Naruto and so that he could intermingle with his generation, any discussion on the topic was banned by the third hokage.

Well, yeah. I was referring to the villagers who were grown up enough at the time of Minato's death. I am more inclined to the theory that the "rule" was imposed later when Hiruzen realised that the elders were not taking Minato's wish in the correct spirit. He had hoped that the villagers would treat Naruto as a hero, but since that didn't happen, he decided that at least the topic should not be discussed further to create more hatred.

If the villagers had literally seen the Kyuubi's sealing, they would also know that he is the Fourth Hokage's son, and at least a few of them would have treated him with love and respect. Only a few ANBU guards were present when the sealing happened, and so far, unnamed characters have never done anything significantly contributing to the plot, so I think it must have been Hiruzen's doing.

I agree with you on the "rule" being imposed later so as to prevent more damage to Naruto's future. I did not mean to imply that the villagers literally saw the kyuubi's sealing, but they knew that the kyuubi was sealed, inside of whom? A child by the name of Naruto. I would also think had they known that Naruto was the son of the 4th Hokage, they would have shown more respect towards him, ignorance on this matter may have been another reason why Naruto was so ill treated by the older generation, always trying to keep their kids off that "monster"

And as the pregnancy of Kushina was confidential, Hiruzen could have said any story about who Naruto was and where he came from, except from a select few, as we see Kakashi was among the few that knew about Naruto's parentage and the kyuubi.

@debal I think you have misunderstood that statement in the question. It is not asking if Naruto went into Kyuubi mode to "show" the villagers that he is the Jinchuriki. It means whether the reason for villagers finding out is that Naruto went into Kyuubi mode. The way it is currently worded, it does sound ambigious, I will edit the question instead.

that sounds more reasonable.. :) I would say that question has a yes and no to its answer. Yes, because the younger generation of Konoha became aware of the Kyuubi's presence inside of Naruto, and No because the older generation already knew about it. But, after that incident, the Villagers did not see Naruto as some sort of a demon, but rather as a hero who saved the Hidden Leaf Village from Pain.

I'm sorry if my question is not that clear and ends you with a discussion. What I'm exactly curious about is if they can hide Naruto's relation to 4th, why not also his identity as a jinchuriki so that the villagers will not hate him.

@NixR.Eyes no problem, buddy. I was not complaining. We are a community after all. Your follow up question is a good one, maybe you should post it separately.

@Happy Thanks! glad to hear that. =).. That follow up question you're saying is what I actually want to ask, I was just not able to put the right word earlier. XD I'll edit my question.

They know Naruto is the Jinchuuriki. What the Third Hokage hid from the rest of the villagers is his relation to Minato and the fact that the village was attacked by Tobi. Many people did not know the kyuubi disaster was because Tobi had attacked and caused it. Instead, they thought the kyuubi had just gone loose.

Only few have known that 4th sealed the Kyuubi inside Naruto, did they intend to let the villagers know he is the jinchuriki and let Naruto suffer their hatred? Why is that so?

The manga never stated why they let everyone know Naruto is a jinchuuriki, but we can assume it was intended to let everyone know because in all other current and past instances, everyone within their village knows who the jinchuuriki is (ie Kushina, Gaara, Bee). Realistically, it makes sense to let the village know of one of your strongest assets. It builds the trust between the Hokage and the people. Hiding it would may cause huge problems, especially if people found out later.

This might not really satisfy you.
But when naruto was trying to get control of kurama's charka kushina popped out.
That time kushina told naruto what had happened during the sealing.
Minato had made a barrier like structure which blocked others from entering it.
They showed that sarutobi and some other shinobi from the leaf were there, watching minato die :(

Now as you can see that there had been many other people who witnessed the scene of sealing the kyuubi.
There can be a possibility that someone else could have leaked the information that the kyuubi was sealed in naruto.
It could also have been that sarutobi himself told them to do so, to protect naruto in some way.

The reason to y narutos parentage was hidden was so that the fourth hokages ememies wouldn't target him, as he is his child. They didn't hide the part where he was a jinchuriki was so that, Naruto would be more protected while he was sent on missions and given more importance. Every hidden village in the five great nations has a tailed beast which holds a lot of power. Since every tailed beast is an important part in their villages military they have to be protected and given more importance at times. When Naruto goes on missions, he has to be given more importance , if a situation where someone has to be left behind to let the others escape. Now they can't let an important part of their villages military strength sacrificed or let it get captured by the other villages shinobi. A jinchuriki might face a lot of ill treatment but is given more protection and importance in matters of military purposes

Can you cite any canonical material to support this?

From what I've seen from a video discussing the Itachi novels, there was a retcon where Naruto actually had a normal life at first, but his Jinchuriki status was leaked by Danzo. The reason why Naruto can't recall this, is because he was too young to the remember that there was a time that he wasn't hated.

Please include relevant sources/references.

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What is the meaning behind Mana Ryougi's name?
During the Type-Moon Fes 10th Anniversary, there was this question:

Q: Who named Ryougi Mana? Was it Shiki, or Kokuto? Or was it someone else?
A: The one who named Mana was Mikiya. Mikiya himself came up with the name without a second thought, but Shiki knew its meaning. She said with a sour look on her face, "Ah, so that's what it is." and accepted anyways

What was the meaning behind her name? Why did Shiki make a sour face?

The kanji in Mana's name, 未那, can be read "Mina" or "Mana" depending on how you read the characters (on'yomi vs kun'yomi, or any combination of the two).
The meaning that makes sense to me is that her name is derived from 末那識 (manashiki), Manas-vijnana:

is the seventh of the eight consciousnesses as taught in Yogacara and Zen Buddhism, the higher consciousness or intuitive consciousness that on the one hand localizes experience through thinking and on the other hand universalizes experience through intuitive perception of the universal mind of alayavijnana. Manas-vijnana, also known as klista-manas-vijnana or simply manas, is not to be confused with manovijnana which is the sixth consciousness.

To put it simply, the name is self-referencing. The meaning of the name implies the ironic pun of the action (thinking). Much like an earnest person named "Ernest", which is an aptronym.
Edit: It has come to my attention that there's another bit of wordplay involved.
The 未 in Mana's name, 未那, refers to things that have yet to happen. The 末那識 uses a different kanji, 末, note that the top and bottom strokes are swapped around. While pronounced the same, their meanings differ significantly.
The latter kanji, 末, refers to the end of something, be it the edges or the end result.
The former is the same character used in the word for future, 未来, while the latter is the same kanji as in 期末, meaning the end of a term or semester.
So it would seem that Kokuto replaced the latter with the former in Mana's name. In other words, replacing a "conclusion" with a "beginning." When you think about it, the double-meaning in itself is pretty clever. Now I know how Shiki (式) felt.

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Relationship of Yin-Yang in Five Chakra nature elements
After reading this question about Chakra nature of Tailed Beasts. It came across my mind what is the relationship of the Yin-yang to the 5 Chakra nature elements? And how come you can classify a Chakra nature as Yin-Yang? Does it has something to do with the Chinese Zodiac or principles of Taoism?

light and dark elements. Light is Yin, darkness is Yang.

And the relationship to the 5 elements?

i think there are no relationship.

For What is the relationship of the Yin-yang to the 5 Chakra nature elements?
Base from here:

Yin relates to one's spiritual energy and Yang relates to one's physical energy and it's necessary to utilise both of these in order to mould chakra for ninjutsu.
According to Yamato, the manipulation of Yin and Yang is the source of non-elemental techniques such as the Shadow Imitation Technique, Multi-Size Technique, medical ninjutsu, genjutsu, etc.

So in relation to 5 nature elements, I think it is the 6th type, having the techniques classified in this type as non-elemental techniques.
And about Does it has something to do with the Chinese Zodiac or principles of Taoism?
It is stated here that:

The concept of nature transformation parallels the real-life art, Onmyōdō (陰陽道; Literally meaning "The Way of Yin and Yang"), which is a mixture of natural sciences and occultism. It largely features Wu Xing and Yin and Yang.

Yin relates to one's spiritual energy and Yang relates to one's physical energy.
Mixing some yin and yang gives you chakra,
Chakra = Yin + Yang

Chakra is the resulting form of energy when two other forms of energy are mixed together. The two energies are referred to as "physical energy" and "spiritual energy". Physical energy is collected from the body's cells and can be increased through training, stimulants, and exercise. Spiritual energy is derived from the mind's consciousness (i.e. the soul) and can be increased through studying, meditation, and experience.

Chakra Control in 2 ways:
Shape Control: Changes the shape of chakra
Eg. Rassengan

Nature Control: Changes the behavior, type and properties of the chakra.
Fire, Wind, Lightning, Earth and Water and there combos like Lava, Ice etc.

Other chakra types:
 Tailed Beast Chakra, Senjutsu Chakra (Nature energy when Naruto in Sage mode) etc.


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Does a Jinchuuriki gain the nature of his/her tailed beast?
I find this question interesting here: Chakra nature of Tailed Beasts.
And I saw the comment: Does a Jinchuuriki gain the nature of his/her tailed beast? And if so, does the tailed beast gain the nature of its Jinchuuriki?
So to confirm this, I ask a different question.

I would ask a similar question. +1.

The answer should be yes... unless someone can give a counter example. Every Jinchuuriki can use attacks from the Bijuu.

i think it's yes, what is that black-liquid type technique obito used when he absorbed the juubi.

I believe it has some sort of influence, but is not absolute:
Example pro:

Roshi, Son Goku's Jinchuuriki, uses lava similarly to the bijuu.
Gaara, Shukaku's Jinchuuriki uses sand much like Shukaku himself (although it was later revealed to be Gaara's mother).

Example against:

Naruto, Kurama's Jinchuuriki, has Wind as his main element, but Kurama has not shown using Wind at all.

I do believe the bijuu has some sort of influence on the Jinchuuriki's chakra development, especially if they're sealed in them when they are very young. (Naruto's chakra alone was said to be at least 4 times in amount that of Kakashi).
As for whether the Jinchuuriki's chakra is the same the bijuu, I don't think so. It's more dependant on genes, etc.

I don't think your Example against really applies to this question : Does the Jin gain the nature of the Bijuu. Shinobi can have multiple affinities and even though Kurama doesn't have wind type, Naruto can still gain his bijuu's chakra in addition to his wind type.

No, I don't think that has ever occurred or will occur in future.
Tailed beast are dependent on the Jinchuuriki for existence and lend Jinchuuriki's chakra whenever required, Its never the other way around.

If the tailed beast is removed from its jinchūriki's body, the jinchūriki will die. Similarly, if the jinchūriki dies with the tailed beast still sealed within them, the beast will die too. Because of this, the tailed beasts tend to be very protective of their jinchūriki, and will take any action whenever their lives are in danger.

They are not good at controlling their own chakra, so I dont think they will be able to control or manipulate any Jinchuuriki's chakra.

Although the Ten-Tails possesses great power, much like the other tailed beasts it is unable to use it effectively due to not having enough intelligence to focus its power without being under someone else's control.

first, the tailed beasts will not die if its jinchuuriki dies. second, how do you explain where did Obito learn that black-liquid type technique, i think's thats one of the ten-tailed beasts nature.

I'm pretty sure the Bijuu will die if the Jinchuuriki dies. That is why Kurama has provided Naruto with chakra in the past, before they got along, like when Naruto was thrown off that cliff and had to summon Boss Toad. The only way out is if the seal is weakened and the Bijuu can escape death before the human dies.

The answer should be plain and simple : Yes, the jinchuuriki gains the nature of his or her bijuu. It doesn't change the jinchuuriki's nature, instead it just adds another affinity. If you had the water affinity, and you have a fire bijuu, then now you can use water and fire as well as the combination of water+fire together in a technique.
Naruto is naturally a wind element shinobi. With the kyuubi inside of him, he can use kyuubi attacks (yin/yang).
It seems like a general rule that once you have something (chakra or body part) of a different nature inside your body, you are able to use attacks of that different nature too. Take Kakuzu as an example. He has multiple affinities due to the fact he stole other people's hearts and stuffed them in his own body.
Having multiple affinities does not necessarily mean they will mix and you can't use them separately. Take Yamato for example, as his affinity is water and earth, which also turns into wood. He can use wood techniques (the combination of the 2), but then also use them individually as he once demonstrated by raising the earth and then creating a waterfall.


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Can a reanimated person, be revived?
If someone is brought back to life with the endo tensi, could they also be brought back with justu's like Outer Path: Samsara of Heavenly Life Technique or what Chiyo used or again with the endo tensi?
I would like to point out the diffrence between my question and Can reanimated Chiyo use One's Own Life Reincarnation technique?. The latter focuses on the paradox of using a life taking justu on an immortal person, while my asks about bring back someone twice, so that there are two of them at the same time.
Also, can you use an endo tensi as a sacrifice for an endo tensi? This way you could have an army with only one sacrifice.

It seems as it is possible, as Madara has attempted to take control on Obito to use the Rinne Tensei on him. Madara usually knows what he's doing, so we can assume that reviving a reanimated person is possible in that matter.
I don't know about other techniques though.

But Obito was still alive

@TAAPSogeking: Madara however, was not. And the point was that Obito would revive Madara. You asked whether a reanimated person be revived, not use a revive technique.

I see you logic, but this is is not a answer to my question. I am trying to ask if a reanimated person can be revived twice or be used as a sacrifice.

@TAAPSogeking: Madara was reanimated, and he then attempted to revive himself the second time using Obito (so that his body can take on the Juubi). So yes, a reanimated person can (probably) be revived with Rinne Tensei.

Oh. Well, thanks for clearing that chapter up for me. That is what I am looking for.


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Are Archer's twin blades a bootstrap paradox?
According to this, Archer's weapon is based from a real weapon.
In the Holy Grail War, Shiro Emiya saw the servant Archer use those weapons. Then he traced them and used them himself. In the future, he will become the servant Archer and will be using those blades as his weapons.
Isn't it an example of bootstrap paradox? Where did he get the idea to use those weapons in the first place? Did the VN explain this?

Somebody else can probably elaborate better, but the basic idea is that the timeline Archer lived in is different than the one(s) we see in the VN. Shirou in the VN isn't the same version of Shirou that became Archer in some other timeline.

But the Archer in that different timeline experienced the war too right? So he must have seen the kanshou and bakuya and it could have influenced him to use it iff he experienced the war. If in the other timeline, he did not experience the war then the paradox is broken.

In the Holy Grail War that Archer-version Shirou experienced, Rin's servant was somebody else, not Archer. This is explicitly stated in some side material somewhere (not the VN itself), though I'm not sure where.

I think it's covered in the first fate/complete material, but not explicitly explained. It's mentioned that he likes them for what what they represent, since Kansho and Bakuya had no owner.

The Archer-EMIYA summoned by Rin is different from Shirou coming from a different timeline where the results of the Holy Grail war were different; the visual novel notes 3 key differences between them:

Archer believed that he could Kill Shirou, thus erasing him from ever becoming a Counter Guardian. If Archer and Shirou were the same he would have known well that he would lose.
Shirou learns Unlimited Blade Works from Archer during the war (in the Unlimited Blade Works route it's helped by a contract with Rin, while in Heaven's Feel it's helped by Archer's own arm). Archer, however, took ten years of training to set the foundations for Unlimited Blade Works and another ten years to reach to the point of being able to use it.
The Shadow caused an undisclosed amount of destruction during the 5th War Archer was involved in. When he first saw it in Heaven's Feel, he put aside his grudge against Shirou and focused on destroying the Shadow as his duty as a Counter Guardian and also in a belief that he could prevent the same destruction again. It's unknown if Archer knew if the Shadow was Sakura or if his twisted life and Counter Guardian ideals (kill one to save many) made him no longer care if destroying The Shadow would result in Sakura's death.

Now, as for Kanshou and Bakuya, they do exist before Archer and Shirou, and their legend remained. However, what they look like was practically lost with the only known description being that Kanshou had a black tortoise shell pattern and Bakuya had a white wave pattern. Their actual shape was derived by Archer himself based on an assumption that they were cast swords common to the time period.
Now, the Projections Archer and Shirou use are inferior to the actual items. With weapons, they need to emulate the experience of that weapon's legends and its history. Shirou just copying "two swords that he admired from a guy he disliked" would make the swords weak, so given time he would probably research the swords and come to the same assumptions as what Archer did, and Archer would have researched the swords as a means to build up his arsenal in Unlimited Blade Works.
Since the true description on their appearance is somewhat lost, Kanshou and Bakuya would be the perfect test weapons on the concept of creating "existing weapons with a new form". This way, even though emulating the experience for the weapons would still make them weaker, being able to improve on them by changing their form and fixing their inherent weaknesses may help them become just as powerful as the originals. I can back this up as I've read somewhere that Archer has modified the design of Kanshou and Bakuya to suit his style so they are more customized.

so basically they're different and its not a loop because it started from the archer EMIYA w/c is not Shirou?

@Keale the key to the Nasuverse (Fate, Tsukihime, Mahou Tsukai no Yoru, Kara no Kyoukai) is that it's made up of parallel universes which can be linked via the 2nd Magic, While the 5th Magic used by Aoko was time travel Touko claims there should be more to it because time travel is also governed by the 2nf Magic so different timelines are also parallel universes

@Keale the Throne of Heros which is where the Servants like Archer come from for the Holy Grail Wars can be accessed in any universe which is why in Fate/kaleid liner PRISMA☆ILLYA the first set Saber Class card (King Arthur/Arturia) has Alter Saber's appearance even though the events of Heaven's Feel didn't occur in the Fate/kaleid universe as the Holy Grail Wars never occurred and the Ainsworth's would have had the Grail from the beginning so in their ritual they would not have created Avenger, tainted the grail and lead to Saber being consumed/corrupted though the actions of another family

Ultimately I think Memor-X has the right answer, but I think there are some other relevant details that are worth remembering.
The Throne of Heroes exists outside of time and space, and the "EMIYA" in the throne has access to all events he has experienced during his summonings in all timelines, worlds, and realities.  But normally a summoned Servant has more restricted access, coming only with those memorizes that the hero has internalized (and the knowledge the nature of the summoning has granted him, such as the Greater Grail System in Fuyuki).  The "memories" of all summonings contained in the throne are likened to books: they're not internal to his spirit, but can be accessed much like you can just take a book off of a shelf and read it to learn what's inside it.
Now, there's something very special about Archer that interacts differently from all of this: he has a Reality Marble.  These exist essentially outside the Throne, and is attached to the heroic spirit as he exists within the Throne.  All summoned versions of him access this exact same reality marble.  And his reality marble stores all weapons (and potentially other things, like Rho Aias) he encounters.  So in order for FSN Archer to be able to project Kanshou and Byakuya (or Rho Aias, etc.) he needs only for some version of himself in some world's timeline to encounter it, and now they all have access to it, regardless of apparent chronology.
In reality things happen more like Memor-X says: rather than witnessing K&B in some fight, Archer is specifically said to have learned of these weapons which were said to be of Noble Phantasm quality but yet no hero was associated with them.  These "fit" him better, as the best projections require you to project the skills and abilities of their wielders.  The lack of such made K&B easier and simpler to create, as well as sort of fit the theme that EMIYA was "nobody", making them feel more natural and like they were "his".
As an aside, this reality marble is also essential to EMIYA's perspective and spirit warping, leading him to come up with the idea to try to kill (an earlier version of) himself in order to end his own existence.  A Reality Marble is the user's inner world made manifest, and the experiences of his summonings impacted his reality marble and effectively carried on their memories to all versions, including the "true" version enshrined in the throne.  You can see this by noting how there are significant differences between Shirou's and Archer's uses of Unlimited Blade Works.  Archer's looks more apocalyptic and miserable, with a cloudy, ashen sky and large gears.  Shirou's tends to have a more hopeful, brighter, bluer sky and far fewer (to no) gears.


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What novel's introduction was Shiori imitating?
In episode 6 of the third season (or chapter 147) of The World God Only Knows, Shiori starts writing her story but scraps the introduction she wrote because it was imitating some other novel.
Does anyone know what novel she was referring to?
Here's a screenshot of what she wrote:

This roughly translates to:

I'm a cross-dressing man
My name is Katsuragi

I think it is pretty natural for start with monologue in some novel and such kind of novels are a lot. For Shiori point of view , that is which she seen to Keima too.

The manga adds one more line which is not that common: "I haven't the slightest idea where I was born", I guess they left it out of the anime for copyright reasons.

I believe this is a reference to the novel "I am a Cat" (吾輩は猫である, Wagahai wa neko dearu) by author Natsume Souseki. It's opening sentences are the following:

吾輩は猫である。名前はまだ無い。

which, translated into English, is:

I am a cat. I don't yet have a name.

The reference is more apparent if we compare the two in Japanese. The grammatical structure of the sentences is very similar:
TWGOK:

吾輩は 女装男 である。名前は 桂木

I am a cat:

吾輩は 猫 である。名前は まだ無い。

All the words other than the nouns are the same. The use of 吾輩 (wagahai) for "I", である (dearu) as a sentence-ending phrase would both be strange in modern writing. In addition, the general structure of the two sentences are similar enough that this is almost certainly not a coincidence.
The novel is very popular in Japan, being Natsume's first major literary work and one of his top three most read (the other two are Kokoro and Botchan), and Natsume himself being in all likelihood the most important writer in Japanese history. It would not be strange at all for it to be referenced here.

And looking at the third sentence settles it. Thanks for the help!


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Why are manga black and white?
This question triggered my curiosity for this question. Why most of manga are black and white? Is this because of more cost if they add colors to it?

We posted a video about this on our Facebook page a while ago.

I've noticed webcomics (manga/manhwa) tend to be in color. (Often made via photoshop etc). Possible evidence for it being a tradition/cost(production & distribution) reason.

There can be different reasons for that, let's try to imagine some of them.

Lower cost. This is obvious (just compare the prices for black ink cartridges and color cartridges for your printer to see the difference). Also, consider that the lower cost of production causes lower prices for the end product - so the readers will be more eager to buy manga.
Faster production. Unlike comics in the US, for example, which usually comes out on a monthly basis, a lot of manga comes out weekly. Coloring would take additional time and make it harder to release new chapters in time.
Manga artists usually don't have a lot of staff to help them, and sometimes even work alone. Thus, they don't have enough time (and, not rarely, enough skill) to color their works well, because:

Coloring is completely different from line art. Not all people that can draw good line art can color well, and vice versa. If you talk about comics, there are usually at least two artists making them: one artist that draws line art, and another artist that is responsible for coloring (this artist is called a colorist). Believe me, coloring is hard. And of course, that person also needs to be paid :P

It also somehow raises the interest of manga fans in watching anime (which is in color), but I doubt this is really a valuable reason, so think of it as of an interesting observation.

One other thing worthy of mention (and which is mentioned in the video JNat posted on the OP): It's just part of the medium now, almost a tradition; it's just something that makes manga, well, manga.

Colored manga is so much better than uncolored.  If you've ever read a color chapter of a manga that's normally black and white, the difference is striking

I wonder about why most of manhwa are colored yet manga are mono in mostly

@NaingLinAung That's like asking why American comics are colored, yet manga are usually black and white. Manhwa is not even Japanese, it's Korean. Presumably, it's the nation's specific comic/cartoon culture that leads to that difference.

As an artist, I can say that coloring with high quality really requires a LOT of time and effort even for anime art styles. It is nothing like a coloring book, because you really have to make it perfect or near-perfect for a public audience, and you also have to do shading and highlights (for most styles). So, coloring is generally reserved for finer drawings like the the cover image.
Also, for manga that is to be published in a physical form, it's more expensive to make full-colored pages, so colored pages are usually reserved for art books (which are expensive like $30-$100 range partially for that reason), or for a few special pages in the beginning of a manga (rarely).

Making manga is a lot of work. It takes several hours to make 1 page of manga according to one of my friends. So just imagine how long would it take to make the entire manga just in black and white. And also, the manga artists have lots of manga to make within certain deadlines and they are paid to make manga the best within that deadline. They literally don't have time to color their work.

Because traditionally images were drawn
Ink, especially in different colors, were not widely available or affordable.
As mentioned before the time needed for coloring was an important factor as well.
Why are webtoons colored? Because it takes hours instead of weeks or months to color pictures with photoshop instead of a brush.

can't they do digital coloring for manga? I believe the line art is digitized at some point in the workflow to allow for printing


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What or who can kill Orochimaru's life force?
Where is Orochimaru's life force bounded? Why doesn't he die like others?

First at Orochimaru's den, Sasuke tried to kill Orochimaru while Orochimaru tried to take over Sasuke's body.
Then later in the manga, during the fight between Sasuke and Itachi, Orochimaru was revealed to be partly present inside Sasuke, where Itachi dealt with him.
Now, after Edo, Itachi and Sasuke beat Kabuto. Sasuke was able to pull out Orochimaru from Kabuto.

Why is that Orochimaru can survive in different distributed forms? How is his life force immortal?
(Sasori was able to survive using puppets for his real body, but the life force was bounded to his heart, so when the heart died, so did Sasori.)
What or who can kill him permanently? (except the author)
PS : I did read the question at this question but what I am interested in knowing is different.

Honestly, if you want a simpler explanation, the curse seals work like a horcrux from HP. A piece of his soul, or life force, is bound to whomever carries his seal, that's why Anko could tell when he was close by. So Orochimaru can only die after all his soul portions have been expunged, and killed from whatever curse seals he's planted.

Let's get the facts right:

Sasuke did not kill Orochimaru. Orochimaru entered Sasuke's mind and tried to take it over, but failed. Hence he got "sealed" inside.
That's why Orochimaru continued to live inside of Sasuke, after exhausting all of his chakra, Sasuke failed to restrain Orochimaru and he broke free (only for Itachi to permanently seal him again).
Orochimaru's Cursed Seal allows him to inject his snake sage chakra. That allows him (much like Minato and Kushina did with Naruto), to have part of his consciousness sealed inside of the people he gives his cursed mark to.
Due to that fact, Orochimaru's consciousness lives inside of Anko, and after supplying it with some flesh from Kabuto (who contained Orochimaru's and Hashirama's cells), the consciousness part was able to retain control and a body. Also, absorbing all of his own cells from Kabuto, he managed to get the information he needed, as well as his life-force, to recover.

Actually, I'm pretty sure that if he's killed now, he'll die (unless he has some backup copy/cells/whatever hidden elsewhere, waiting for the next sucker to discover and awaken).

He did what Voldemort failed to do ;)


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Do the moths during Grumman's thoughts have any symbolic significance?
In episode 47 (12:08) of Fullmetal Alchemist: Brotherhood, general Grumman's thoughts about a leadership position in Central are made audible to the viewer:

Miles: And what about the plan, sir? Aren't you going to proceed to central?
Grumman: I don't seem to have much choice. I suppose I'll just have to let Colonel Mustang have the biggest slice of Central pie.
Grumman (thinking): Bradley's current administration will still be properly functioning at this point in time. If Colonel Mustang or General Armstrong try to make their move now, every soldier in Central will be ordered to retrieve their treasonous heads. And once they're captured, I'll step in to restore order. They'll take the fall as enemies of the state, while General Grumman will heroically come riding in on a white horse. I'll let the youngsters dive head-first into danger and do all the dirty work, and then I'll take my rightful place as leader of this country without any risk.

During the bolded part of his speech above, a lamp is shown with a few insects—which appear to be moths—hovering around it. One unfortunate insect flies into the lamp and is burned to death.

This seems like an odd thing to show during such a speech, which leads me to believe it might have a deeper meaning. Does this lamp scenario or the moth's death symbolize anything?

I believe this refers to the saying "like a moth to a flame".
The saying indicates that something/someone is irresistibly attractive (not necessarily as in human attraction), but that it will ultimately lead to downfall. Remember, at the end, the flame engulfs the moth, and it dies.
So, Bradley and Mustang are fighting for peace/freedom/a good future. They themselves believe that they cannot stay away from the fight, as it must be done in order to achieve their goals. Yet still, the path they take is being predicted and taken advantage of, which, in the eyes of Grumman, will lead to their downfall.
So, the metaphor with the moth is used in a perfectly valid manner.

I don't know if this story was the basis of the appearance of the moth but I know a story about it from our country Philippines. I don't know if this story is already known around the world but it was a story told by the mother of our national hero Jose Rizal.

It was Jose Rizal's Mother who told him about the story of the moth. One night, her mother noticed that Rizal was not paying anymore
  attention to what she is saying. As she was staring at Rizal, he then
  was staring at the moth flying around the lamp. She then told Rizal
  about the story related to it.
There was a Mother and son Moth flying around the light of a candle.
  The Mother moth told her son not to go near the light because that was
  a fire and it could kill him easily. The son agreed. But he thought to
  himself that his mother was selfish because she doesn't want him to
  experience the kind of warmth that the light had given her. Then the
  son moth flew nearer. Soon, the wind blew the light of the candle and
  it reached the wings of the son moth and he died.
Rizal's mother told him that if the son moth only listened to what his
  Mother said, then he wouldn't be killed by that fire. (source)

The relevance I can see between the quote and the symbolism of the moth is (if this story was really the basis of the symbolism), probably, Grumman was comparing himself to the mother moth and the soldiers to the son moth who didn't listen to him so they'll be like that moth who'll burn themselves.
Note: This is purely based on my opinion.

Well, but them diving into the "lamp" first doesn't mean he'll succeed to do so later on. I guess that makes sense though :)

@MadaraUchiha, an upvote then? ;P


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What were the first anime based on manga and light novels?
I know that original animes weren't based on light novels or mangas (see: this). However, I think there are some early shows that are based on mangas (Astro Boy for example, I think). What was the first anime based on a manga? Also, what was the first anime based on a light novel?

While not the most scientific method, one could generate a list of anime entries over at Anime News Network, sort it by order and see what is the earliest entry in their database that fits the criterion we're looking for. Here would be an example of such a list.
Obviously the service's database is most likely incomplete, but regardless, it is still an authoritative source for anime information, and given the size, and time range of the database, it can be trusted as a good estimation.

First anime based off of manga:

Astro Boy, 1963

First anime based off light novels:

Legend of the Galactic Heroes (OAV) 1988
Slayers (1995)

Although I'm not sure if it's considered a light novel or not, Ginga Eiyuu Densetsu would predate Slayers  by quite some time. If the "light" bit is optional, then some of the early anime were based on novels (such as Journey to the West). +1 for Astro Boy.

@coleopterist > Gotcha. I added what I believe to be the ANN entry for what you're referring to. Correct me if I'm wrong.

Technically, Tetsuwan Atom (1963) is the first anime to exist and was also based on a Manga, but if you do not get too technical on what anime means and just refer to animation from Japan you get Shou-chan no Bouken (1924) as the first such "anime" that was based on a "manga".
The first anime based on a Light Novel is Kikansha Yaemon: D51 no Daibouken (1974) and the first "anime" based on a normal novel is Saiyuuki: Son Gokuu Monogatari (1926).
Though, what we commonly refer to as anime nowadays - the whole subculture stuff - only originated around 1978-1982, so none of the titles above fit if you go by that understanding of anime.

Nya, "Norakuro", maybe? I'm not sure if that was the first anime based on a manga, but, anyway, the first anime of Norakuro predates Astroboy anime and predates too the Second World War

Sources would be useful to include here.


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Are the chosen anime within Welcome To The N.H.K. of any significance?
In the anime of Welcome To the NHK, the show that is constantly played nextdoor is Puru Puru Pururin.

We know this character is not from a real show (although it has a website alluding to this), so it's not an external influence.
In the manga, an Ojya the witch is mentioned, along with lyrics from the relevant show:

Please give me the courage in my heart to help me fold away this carpet of sadness and discover the me inside,
Oh yes, the delicate heart of a lady,
Just look in my eyes and tell me you love me,
It's like a fairy tail
...

Do we know if this is an actual show? If so, is it of any relevance?
In the light novel, the show that is played constantly is Ojamajo Doremi (or Magical DoReMi in English) and a life-size figurine is introduced from Martian Successor Nadesico

 Yamizaki declares that the figurine is God and tries to convince Satou to worship it.

Do the choice of these shows have any significance?  Are there any (rough) similarities in plot to Welcome to the NHK?
TL;DR - Do we know the show that was in the manga, Do the shows in the light novel have any meaning or were they just chosen arbitrarily?

It always reminded me of Di Gi Charat ("Dejiko") but I don't have any evidence that this was intentional. Visually they're pretty similar, and both are sort of used as mascots (Di Gi Charat being the mascot for the Broccoli gaming company). They also both append random words to the end of their sentences (e.g. "purin"). Additionally, according to Wikipedia:

An animated Dejiko and her sidekick Gema first appeared on in a television advertisement for Gamers, set to the store's theme song, Welcome! by Hiroko Kato

But again, don't know any official source that says one way or another about the similarity.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/


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Is Roronoa Zoro based on Rurouni Kenshin?
There are several similarities between the two characters and also the characters they interact with.

They are both extremely skilled swordsmen.
Their names/titles are slightly similar and hint at being swordsmen. I'm not entirely sure about Roronoa but Kenshin's name was derived from some samurai novel. Also, vaguely note how execution is a main topic in and is constantly mentioned in One Piece and the character Kenshin was based on a samurai who was executed.
Kenshin was released in 1996 and One Piece came later in 1999.

From ANN's plot summary of Rurouni Kenshin

Himura Kenshin is a vagabond with a dark past and sunny disposition.
  Not a ronin but a rurouni, he was never a samurai, but an assassin
  of utmost skill in the Meiji restoration, who in the turning point
  of the war simply walked away. His travels lead him to Tokyo in the
  11th year of the Meiji era, where he befriends a female Kendo master,
  a former thief, a brawler and a doctor all with their own
  secrets. Together they fight off the enemies surfacing from the dark
  past that Kenshin cannot escape. (Seems familiar with a certain
  character's merry band of men?)

From One Piece plot summary:

... Along his ways, with luck and determination, he finds himself many
  members who are devoted but to different causes. (Sounds familiar with a certain wanderer?)

So I would like to ask, is there any source that confirms whether the character Roronoa Zoro from One Piece is related in any way to Kenshin, or whether One Piece is somewhat influenced by Kenshin?

i seem to recall  Zoro's family name was based on a real life french pirate named François l'Ollonais.

Note that I'm not entirely sure about Roronoa but Kenshin's name was derived from some samurai novel. which cites urban dictionary is a misunderstanding. The term rurouni is coined by the author himself for the series. The term is explained on Japanese Wikipedia, but I'm not sure how to translate: タイトルの「るろうに」とは流れ者や放浪者を意味する本作の造語であり、漢字表記は「流浪人」

Btw, Kenshin in Japanese is 剣心, which contains the character for sword and heart.

Although it is never really stated they are "based on each other", Nobuhiro Watsuki helped in the making of One Piece.

In the manga series "Rurouni Kenshin", the Straw Hats' flag design was used on a bomb to start a vengeance hit on one of the main characters of the series. Before writing "One Piece", Oda worked as an assistant to Nobuhiro Watsuki, the creator of "Rurouni Kenshin".

Also, Nobuhiro Watsuki usually creates his characters based on historical figures, or figures from other anime/manga:

Watsuki bases many of his characters on historical figures, characters from other manga/anime, and video games series. For example, Himura Kenshin was based on Kawakami Gensai, one of the Four Hitokiri of the Bakumatsu.

Watsuki also mentored  Eiichiro Oda, the creator of One Piece. So Oda's creations might have been a bit influenced by Watsuki, making Zoro somewhat resembling Kenshin.

Nobuhiro Watsuki is known for mentoring several manga artists who eventually got serialized.  For a while there was a time when the most popular Jump manga authors were all his assistants.

Eiichiro Oda - creator of One Piece

Sources: Nobuhiro Watsuki, Eiichiro Oda

nice answer.. but why do you have blockquotes, but no links. ;)

@iKlsR was at school so had to rush it a bit ill add the source links now ;)


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What is the original text of Black Hanekawa's tongue twister?
Bakemonogatari episode 14 has a fairly famous tongue-twister in it, which Black Hanekawa recites with her cat voice. It was translated as: "Can you imagine an imaginary menagerie manager imagining managing an imaginary menagerie?". The scene is here (potentially NSFW):

Bakemonogatari - Neko Hanekawa Tongue Twister | HD |

Translating tongue-twisters is notoriously hard, so I suspect this is done fairly liberally.
What is the original Japanese text which is being spoken? Also, what does it literally mean (not worrying about making it a tongue-twister)?

Yes, huge liberties were taken with this phrase. The English phrase roughly corresponds to: "Can you think up a group of caged animals who are dreaming of handling fictional caged animals?"
The Japanese one, however, is more or less the following:

斜め七十七度の並びで泣く泣く嘶くナナハン七台難なく並べて長眺め
Naname nanajyuunana-do no narabi de nakunaku inanaku nanahan nanadai nannaku narabete naganagame.

And Black Hanekawa's kitty version is something like

にゃにゃめにゃにゃじゅうにゃにゃどのにゃらびでにゃくにゃくいにゃにゃくにゃにゃはんにゃにゃだいにゃんにゃくにゃらべてにゃがにゃがめ
Nyanyame nyanyajyuunyanya-do no nyarabi de nyakunyaku inyanyaku nyanyahan nyanyadai nyanynaku nyarabete nyaganyagame.

Now, very roughly, this translates into English as something like...

I have been watching these seven 750cc motorcycles (nanahan) which are noisy like horses, and are placed beautifully at an angle of 77°.

It's very clear the English and Japanese tongue-twisters are nowhere close in meaning. What I can say about why they were chosen is that the English one plays off the sound mee as mew, the sound of a kitten meowing; the Japanese one plays off na as nya or nyan, a common way of making onomatopoeia for a cat's meow.


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Where do the Naruto movies fall in the timeline?
I know that the Naruto movies are outside the timeline in the sense that they don't affect whatever happens after them. However, they must fall somewhere in the Naruto timeline — based on who are in the movies and how the characters look like, etc. For example, if Sasuke isn't in the movie, it should take place after he left. For each of the movies, approximately what timeframe (between episodes/arcs) are they set?
The movies:

Ninja Clash in the Land of Snow
Legend of the Stone of Gelel
Guardians of the Crescent Moon Kingdom
Naruto Shippuden the Movie
Bonds
The Will of Fire
The Lost Tower
Blood Prison
Road to Ninja
The Last - Naruto the Movie
Boruto: Naruto The Movie

After that The Last: Naruto the Movie came out, but we know it takes place two years after the war (they say that in the movie). Than Boruto: Naruto the Movie which is somewhere after Naruto turns into the Hokage and Boruto is taking the chunin exams.

Ninja Clash in the Land of Snow

 between episodes 101-106

Sakura's hair is short in the movie. She cut it during the chunin exams.
The limited opportunity team 7 has to go on a mission together between the chunin exams and Sasuke's defection would be between episodes 101-106
Legend of the Stone of Gelel

 The movie takes place after episode 160

Guardians of the Crescent Moon Kingdom

 The movie takes place after episode 196, during the anime's post-Sasuke era

Naruto Shippuden the Movie

 After Shippuden episode 53, when Naruto, Sakura, Sai and Yamato returned to the village.

Inheritors of the Will of Fire

 After Shippuden episode 89, due to the large influence of the Hidan and Kakuzu Arc.

Bonds

 After Shippuden episode 111, since Orochimaru was sick, which happened around when Sasuke was about to kill Orochimaru.

The Lost Tower

 After episode 152-154, after Jiraiya's death and before Pain attacked the village.

Blood Prison
No accurate timing, due to plot inconsistencies:

 Naruto knew Sage Mode and remembered when he met his father, despite the fact that the invasion of Pain had not occurred. A, the Fourth Raikage, still had his left hand, despite having lost it during the Five Kage Summit. Naruto knew Killer B, but Naruto did not meet him until their training at the Island Turtle. Anyway, if I had to put it somewhere, I'd probably put it after episode 196.

Road to Ninja

 After episode 251, because Naruto must have already met his mother, and I don't think it would take place in the middle of a war. However, the fact that Konoha shinobi were fighting against Pain and the Akatsuki at the beginning would place this before the 150s and undermines the plotline of Naruto's understanding of his parents, which means that it just doesn't fit perfectly. Later in the movie, it was showed that the Akatsuki members were white Zetsu's, not the real ones (which is why they were defeated so easily and could go through the ground).

The Last
I'd say this movie happens after episode 493, but I would watch it after ep 500 because some stuff the happens in the end of the movie

 that hints to the episode 500.

Boruto: Naruto The Movie - The Day Naruto Became Hokage
This happens before 'Boruto: Naruto Next Generations' so watch it after Episode 500. It's a special episode, so it's about 10 minutes. The title of the short "film" says it all.
Boruto: Naruto The Movie
This movie happens after the 'Boruto: Naruto Next Generations' have started.

 Probably around the The Chūnin Exams.

Why are the first 3 and the fifth entry not in spoilers?

Well, the others contain potential spoilers, and they don't, so I left em

he is this uptodate?


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Would the Inuzuka or Nara technique count as a kekkei genkai?
Kekkei genkai are considered abilities passed on through bloodlines, from this question: How is a technique characterized as a kekkei genkai? When discussing kekkei genkai, however, people never seem to include clan abilities such as the Nara shadow possession or the Inuzuka collaborative jutsu with their dog partners. Would these (or similar) abilities count as kekkei genkai, and if not, why not?

Nope, they are not. The abilities that you mentioned are just hiden (秘伝, not to be confused with "hidden") techniques, exclusive to a specific clan. There is a difference between them and kekkei genkai abilities.
Kekkei Genkai is passed down genetically, so every member of a clan has an aptitude for it.
The hiden techniques, on the contrary, are not passed down genetically, but rather "taught", so in fact anyone could learn them if they were not kept in secret.
For example, take Parasitic Destruction Insect Technique, which is exclusive to Aburame clan. However, it's not a genetically-passed ability, it's rather that only Aburame clan knows what needs to be done in order to place the insects into one's body and to learn how to live in symbiosis with them.
You can read more on the subject here.

Also the ability to use a Kekkei genkai is affected by the chakra type you are born with, normally a shinobi is born with a single chakra type hiwever in the case of a Kekkei genkai user, the shinobi is born with two nature types


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When does one become a Super Saiyan?
As per this Wiki page :

The Super Saiyan transformation comes in response to a need, not a desire.

So does it mean that even if a Saiyan might reach the energy level that a super Saiyan might have, he'll still not get converted to a super Saiyan unless there is a need? Energy level doesn't determine the ability to become a Super Saiyan, but a need to become one does?
On the other hand, as per the discussion on this page, it seems energy level is indeed an important factor.
It's confusing.

It really is confusing, and there is conflict as to what is really happens. I think our best guide is the story itself. For this answer I will be using the anime as a guide. Lastly, please note that this discussion pertains only to Super Saiyan itself, and not Ascended Saiyan, or SS3/4.
Now, Goku himself says, when training Gohan, that it does indeed come from a need, and if needed you can create that need. Though, I'll have to check with the original Japanese, because perhaps this wasn't the best word to use in translation? Considering that he also notes that the pain of loss as an important factor, this leads me to believe that perhaps it is more of an emotional thrust than a direct need per se.
Either way, in my humble opinion you need a mixture of the two (need and power-level.) If I'm not mistaken, no one is shown doing it without both factors.
Examples:

Goku

Spent much time training in 100x gravity, which undoubtedly boosted his power-level way up.
He was pushed over the edge by an emotional trust. (The ruthless death of his friend.)

Vegeta

Out of pride he spends his time in training trying to become a Super Saiyan, just like Goku, including some time in 450x gravity.
Out of anger, jealousy, and pride he is pushed over the edge.

Gohan

Spent much time training with his father in the Hyperbolic Time Chamber.
He is pushed over the edge by the distraught he feels at the idea of failing his friends.

Now, this is only valid in the act of becoming a Super Saiyan. Later on, once a Saiyan has learned how to control it better, the emotional thrust is lessened (if not removed altogether.) In addition, when higher forms of Super Saiyan are considered, the emotional barrier is lessened even more so, and the emphasis is placed more on power-level, and perhaps skills.
As for other Super Saiyans whose original transformations are not explicitly shown, I leave that up to pure speculation. At least we have three good cases to base our claims on; perhaps the rest just belongs in the imagination.

What about trunks? No anger no pride....how can he be able to transform that easily?

@AnkitSharma We're taking about the first transformation, right? If I'm not mistaken this is never shown directly for Trunks and Goten, so we can't be 100% certain he didn't have an emotional thrust, nor do we know what his power-level was exactly when it first happened. Now honestly, while other factors really could be (and probably are) involved in the process, I can only provide and speculate on what we actually perceive. Does that make sense? :P

It basically happens when the Saiyan is strong enough, and there is a surge of strong emotions.
For example:

Vegeta achieved because he was frustrated with himself. He had just given up and decided that he would never catch up to Goku. He was also in a life threatening situation. Combine those two and you have SSJ Vegeta.
Goku goes SSJ after Krillin, his most precious friend, is murdered in front of him. Goku's anger explodes and he goes SSJ.
Gohan goes SSJ when training with Goku, but then uses anger to ascend.
Goten goes SSJ when Chi-Chi slaps him. I suppose he was angered and that triggered the transformation.

Both the factors are equally important. Without one the other is incomplete.. A saiyan needs both a great amount of energy and an emotional turmoil as the catalyst.
As per the link
Goku achieves the form out of anger over the murder of his best-friend Krillin
and
Bardock achieves the form out of anger after Chilled attacked a Plant child called Berry,

 while Vegeta achieves the form through sheer frustration at his original inability to achieve it, especially over Goku.

 While training in the Hyperbolic Time Chamber, Goku tells Gohan that becoming a Super Saiyan is powered by rage and told him to imagine Cell and then Frieza when Gohan said he had never seen Cell, killing all his friends to transform into a Super Saiyan.
This shows that everyone required a catalyst to turn to the super saiyan mode.. It was just made easier that Goku had a high power level which was inherited by both Gohan and Gotan in case of Goku; and Trunks in case of Vegeta.. It is not shown how and when they learnt t transform, so its difficult to define the conditions for the same. But it was easier for them since they possessed a very high level of power.
As further stated on the same page :
 The power increases of subsequent Super Saiyan forms are so high that by the Buu Saga, the original transformation has been literally reduced to that of a "child's play thing" (as stated by Vegeta; as both Goten and Trunks can transform and harness the power adeptly at such a young age).
This was mainly done to undermine the first level of Super Saiyan level so that the greater levels could be defined to be more powerful and special in comparison to the first.

The two are intrinsically linked. Every creature supposedly has a threshold that they "can't surpass." Super Saiyan allows the Saiyan to break the threshold completely and become something more than they ever could have been without it. It pretty much only happens when a truly desperate circumstance has forced it out of them, but not just any Saiyan can become a Super Saiyan either.

In the Manga they said, that they need to have a "pure" heart.
At Goku it was pure good and at Vegeta it was pure evil. And than they additionally need a catalyst.
For Goku it was the anger about his killed friends and for Vegeta it was for not becoming a Super Sayan.
In the Manga is not mentioned that they need a minimum or maximum power level.
So I think in normal form they might be much stronger than a Super Sayan and can't transform to super Sayan until they have this pure heart or catalyst.
If you continue reading your wiki source you will notice that there written that there are no more known conditions to become a Super Sayan.

Vegata was ultimately push to the brink and cross over as super being in jeporady of losing his only way off the planet he training on due to asteroids and too many of them getting ready to crush his ship and trap him there and he already been training and exhausted himself when the huge amount of asteriods started coming for him and his ship quickly over whelm off how many their was and exhausted he quickly became in fear of being trap and dying on some worthless planet he quickly try to amp up his energy and fearing he was depleted and needed a energy boost to some up a large amount of energy powerful enough to destroy every asteroid all together instead one by one so his need was met when he needed to boost his enegry the most and excerte extreme amount of power to blow away every asteriod all at once to save himself and ship from being crushed and trap, that's when his need for being super came into effect and quickly boosted him over the brink of exhaustion and gave him the energy to produce attack big and powerful enough to clear every asteroid and save his ship at that point a super saiyan knows what energy level needs to be rechead and what strength is required to cross over and transform super, yes when training you need to acquire that need helps the saiyan push his level above exhaustion that he didn't know he could do that, need keeps the sayian going and powering up instead of stopping and thinking that he can't go no higher with his power level simply trying to power up to cross over will not work a sayian must teach his body in training that super needs to be acquired for the fight he training for in order to win thus everybody reaching insane power levels unknown thinking they are ready for complete cell but cell was designed to be better and the ultimate fighter forced of sayian genetics they did not know and every saiyan studied over the years cell was hatch and created and was a forsure Victor ofform he too just n like frieaze uses the planet to their advantage to distract the sayian from the fight so we never really know if a new born super sayian could beat frieza or cell both killed by their own attacks and downfall  the sayians in complete form also explaining his need and the sayain always fight n win attitude is what ultimately gets them to that point saying ultimate desire is to be the best goku just doesn't admit that he too kind but always secretly trains to be the best that and his pure heart and strength and ability to easily acquire techniques destined him to become  the dragon ultimately explaining the story line surrounded around goku. , pretty much the same as goku in his first fought with vegeta and his kio-ken times 10! Once a saiyan acquires how to get to super level this ultimately their natural high power level form is mere nothing on the scanners and and just like always they can mask their evergy level at natural form so they basically them become high power sayians in everyday life masking their energy with ease keeping their level right at super and easily transforming to super sayian when they please and then the power up starts just like trunks did vs his fight with cell but did not win after just meshing and harnessing true power trying to use it against perfect cell made of androids and z fighters and ultimately the advantage of super sayians thus doctor was on planet namek and his bug collected cell of super sayian goku,so to answer question simply a need is acquired on training to learn of unreached power levels and keep the sayian powering up with out giving up and needs to learn what that level is the amount of event and rest acquire to reach it, goku says its a need cause it was vs frieza so that's his way of explaining to get to super level, but training and getting stronger and having a sayian knowing that super saying level is real having not seen their own ancestors do it because frezia put the fear in all sayians that they could not reach that sayian level it's a myth so no sayian ever tried to push pass exceretion and train their body to transform, all sayian are super strong and the ability to heal and get stronger after a fight plays a big role shall to a sayian reaching super level, the need is just goku explanation but works as a mind technique to become stronger and better there's always a need a saiyan wants to win their fight thru out the whole dragonball z series so why didn't goku become sayian as a boy faced with some serious needs to win against some tuff oppents? but training and becoming stronger is the ultimate key to becoming sayian so the need plays no part in small trunks and small gotenks  being sayian a young boy can not simply reach that power level, so how they do it? Lmao who knows sayian freaks they do what they want and kick ass!!!!! Lol z fighters!

You might want to work on your punctuation and paragraph building. As this is really, really hard to read. And even then does not really answer the question. when does one become a super saiyan. you might want to take the tour to get a bit more familiar with the site, and improve your answer a bit :)


text:
Why are Kobato's eyes inconsistent in color between episodes?
In Boku wa Tomodachi ga Sukunai, Kobato (Kodaka's sister) appears to have Heterochromia iridum.
Her right eye is red and her left eye is blue.

But in episode 5 of the first season, both her eyes are blue.

What gives?
Is she wearing contacts? I wasn't able to find an explanation for this from the Anime.

It is not heterochromia. The manga does explain it better and ...

her normal eye color is blue.
she is wearing a contact lens.

There is also a mention of her mother being English and having red eye color. So wearing a contact might be a fashion statement.

Her eye is not those kind of special eye or Heterochromia type , she is wearing eye contact to match with the anime character she's cosplaying

Is it a specific anime character or is she just trying to look cool/different/unique?


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Has an anime ever come out before the manga was published?
I got into a debate with a friend about whether or not it's possible for an anime to come out before its manga.
He claimed that there were several instances where the anime actually preceded the manga. Is this the case?
P.S.: I know that there are several anime without a manga. I also know that there are manga created from games. That's not what I'm asking. I'm asking whether or not there is a series where the anime came before the manga.

Yes, there are exceptions to the "rule" that an anime must be inspired by a manga. There are indeed some anime that do not have a manga corresponding, and other such things.
But yes, there are also anime series which inspired one or more manga.
The following list are some of the (arbitrarily selected as recognizable) names from a more complete list featured on the TVTropes article "Anime First":

Code Geass
Cowboy Bebop
Digimon Xros Wars
Nausicaä of the Valley of the Wind (as the article says, a weird example; the manga was created for the purpose of guiding the anime film)
Wolf's Rain

There's also some great shows based on video games (Gungrave) or novels (Baccano), rather than mangas.

The one that I like is Initial D.  First the anime came out, then the manga, then the manga surpassed the anime, then the anime started following the manga...

Evangelion, Suisei no Gargantia

also Nagi no Asukara

Yes it is possible. And it is actually quite common. A couple of recent examples would be:

Sora no Woto (Sound of the Sky)
Puella Magi Madoka Magica

Note that in both examples here, there is some overlap between the release dates of the Anime and the Manga. But the key point is that the Anime was started first.
Often times an Anime would be done as an original work. Then if the Anime turns out to be extremely popular, then the producers will go ahead and do a Manga as well. (To milk the cash cow.)

Two more examples of series where the anime came before the manga that I am familiar with are Vandread and Sakura Taisen (a.k.a. Sakura Wars); though to be fair, that latter series was a video game franchise first, before being adapted to anime, and then adapted to manga.

It seems that I may be of little help to you, but there is a manga currently ongoing
and the anime is ahead of both the spin off and the ongoing series. The manga/anime is called
Mushibugyo, and the second series is Joujuu Senjin!! Mushibugyo.

There is no particular rule that anime ought to be adaptions of existing manga. Many anime are original, written by the director and screenwriters. Some of the most popular of these receive manga adaptions after the anime has started airing. Some of these receive both a shounen manga and a shoujo manga, which are illustrated by differing mangaka and either run in different magazines concurrently or run at different times. Some examples of these titles which have both a shounen adaption and a shoujo adaption are:

Neon Genesis Evangelion
Code Geass
Shin Kidousenki Gundam W
Tenkuu no Escaflowne
Mahoutsukai Tai!

Anime that later get adapted into manga is not uncommon in shoujo, as shoujo manga magazines an not financially-viable and make less money than shounen magazines, so they are keen to cash in on a title that already has a fanbase (thereby collecting those prior fans who will then begin to buy their magazine and/or graphic novels who otherwise would not have). Some examples include:

Cowboy Bebop and Cowboy Bebop Shooting Star published in ASUKA
Pretty Cure (many varieties) published in Nakayoshi
Ojamajo Doremi published in Nakayoshi
Akihabara Dennou-gumi published in Nakayoshi
Super Doll★Licca-chan published in Nakayoshi
Mahou no Stage Fancy Lala published in Ribon
Aikatsu! published in Ciao and Pucchigumi
Pocket Monster PiPiPi Adventure and Pocket Monster Chamo Chamo Pretty published in Ciao
Tottoko Hamtarou published in Ciao
Majokko Tickle published in Ciao
Cutie Honey Flash published in Ciao
Corrector Yui published in Ciao
Jewelpet published in Ciao
Fushigiboshi no Futagohime published in Ciao


text:
What are the differences between types of anime?
The terms "shoujo", "shounen", "seinen", and "josei" are used to classify anime/manga. I know that the general meanings are as follows:

Shoujou: for girls
Shounen: for boys
Seinen: for men
Josei: for women

What are the more technical definitions of those terms?

By "technical definitions," are you asking for the target demographic classifications like age ranges or how they came to be named such?

Target demographic classifications.

I always thought that it referred to the age/gender of the main protagonist! Good to know!

There isn't much to add to your concise classification, really.

Shōjo
The word itself (少女) is used to refer to a young woman, approximately 8-17 years old. Right as you might think, Shōjo manga and anime have them as target audience. Shōjo isn't limited to any particular style or styles, it's only defined by the target demographic.
Shōnen
This kanji (少年) is used to refer to boys from elementary school to grade school age. Shōnen manga and anime are obviously designed for them as target audience.
Seinen
Seinen manga and anime are designed for male audience too, but this subset of manga and anime is made for people of older age, usually from 18 to 30, but the real audience can be even older than this with some manga. Such manga and amine usually emphasise the story and the character's personalities instead of action.
Josei
Josei manga and anime are for women aged between ~15 and ~45. They tend to be about everyday experiences of women living in Japan.

There are also sub-types of anime/manga, which tend to be more specific, for example, mahō shōjo is a sub-type of shōjo that focuses on young girl heroes with supernatural abilities (magic girls, right...).

Source: various wiki articles.

One fun thing is that the target is one thing, but who actually reads the manga is another thing...

Are there any other genres? (e.g. targeting audiences older than 40+?)

The answer isn't really more technical than that. It's just the target demographic. The difference between a shonen manga and a seinen manga, for example, is often just a matter of which magazine it's published in.


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Did Walter become Millennium's servant by choice?
Walter tells Victoria that he was brainwashed and forcefully turned into Millenium's minion, but then says that he attacks what remains of Hellsing by his own free will. Bad characters usually mess with good ones, so it's not clear how it really happened to him.
Related: Did Walter become Millennium's servant by choice? @ SciFi & Fantasy

I also asked this question on SciFi earlier, but nobody answered, so It was suggested that I post here, and so I did.

From the Hellsing Wiki:

It is also currently unknown whether or not Walter's brainwashing by Millennium was consensual, or if he was brainwashed against his will.

However, on the same page, it is also stated that

In chapter 75 of the Hellsing manga, Sir Hugh Irons, the acting leader
  of the Convention of Twelve, comes to the conclusion that Walter had
  in fact been betraying his superiors for quite some time, even before
  the second coming of Millennium and possibly even since the days of
  the World War II. He mentions that he foresaw Richard Hellsing's
  attempted coup of the Hellsing Organization and also Richard's
  assassination attempt on Integra, and had quite specifically warned
  Walter of it, charging him with protecting her; and yet, despite his
  warning, Walter was nowhere to be found on that day. Therefore it is
  suggested that Alucard's awakening was also orchestrated by Walter;
  his convenient absence left Integra with no other choice but to
  release Alucard, whom Arthur Hellsing (Integra's father) had
  purposefully sealed away, thinking him to be too dangerous to use as a
  weapon. Other bits of evidence suggesting that Walter is a traitor
  include the Valentine brothers' mysterious knowledge of the location
  of the Hellsing mansion, Walter's suspicious memory lapse when
  Millennium resurfaces (he does not seem to remember storming and
  destroying Millennium's base in World War II, but claims that he does
  after Alucard prods him), and the strange omission of the fight scene
  between Walter and his apparent rival, the Captain. It may be that,
  after seeing Alucard's abilities during World War II, Walter wished to
  destroy him to prove himself and thus allowed Alucard to awaken.

It's still shrouded in mystery, however, I think he wanted to battle against Alucard in a fair fight, more than "betray" Integra or Hellsing.
He may have been brainwashed and he may have not, but it was very clear that he wanted to beat Alucard in battle, and that the deal he made with Millennium was made to achieve that goal.

Actually, Walter wasn't brainwashed and he wasn't exactly Millennium's servant either, if not he would not have protected Integra. He only wanted to do his job as a vampire hunter, and kill Alucard. He first met Alucard during World War II; they were allies then. He knew he wasn't strong enough at that time to match strength against Alucard, since he was just a teenager. So, he made a deal with the Major in 1944, probably during Hellsing: The Dawn. A deal that he would be turned into a vampire, so that he will be strong enough to match Alucard.
However, Alucard was sealed away after World War II by Integra's father. It took 50 years, but Walter made sure that Integra had no choice but to release Alucard upon her father's death. Walter knew that Integra's uncle would try to kill her, and she would have to release Alucard if he wasn't there to defend her. But that was still not enough, he knew that Alucard had millions of lives within him, and he couldn't be killed, so he had to wait until Alucard was more vulnerable. He waited 5 years, that's when Millennium invaded London, and Alucard was given the order to release Level 0, releasing all the lives within him, leaving him with 1 life left within him, that when Alucard was at his most vulnerable.
But all that was for nothing, Alucard just summoned all the blood on the battlefield to him during the fight, reclaiming all the souls that he had released at Level 0, plus the souls of those who had died on the battlefield that day, giving him about 3.5 million lives, which was more lives than at the beginning.

The answer to this question is so much more simple than you guys are making it. Yes, he says to Seras after she asked what happened to him that he "was brainwashed and forcefully turned into Millenium's minion," but then immediately after goes on to say "Is that what you wanted to hear?" implying that everything he said before that was complete and total sarcasm. He did it willingly. No one knows the true reason he betrayed the Hellsing Organisation. However, Alucard does say in his fight with Walter that he thought it was because Walter was "afraid of being old and useless. Maybe afraid of being forgotten." Walter confirmed Alucard's theory of being forgotten by saying

We are the evening's entertainment. And I... just wanted to do something with my time on the stage worthy of applause...

Which can lead us to believe that Walter wanted to do something he would be remembered by. And killing Alucard would certainly be remembered. But he never specifically says that's why he betrayed them
So why Walter betrayed the Hellsing Organisation is unknown, but Walter very clearly says it was his own choice. When he said he was brainwashed, he followed it up with something implying that that comment was to be taken as sarcasm.


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How could time seem to be slowed down when a Host speaks with his Tailed Beast?

Possible Duplicate:
What happens when Naruto is talking to the Kyuubi?

Remember the scene, Jiraiya pushed Naruto off the cliff! or Naruto in tailed beast form when got stuck in Pain's Chibaku-tensai. They seem to have long time conversation among themselves isn't it?
How much time does it take to fall from a cliff to hit the ground… But Naruto and jinchuriki take their own time to come to an understanding.
Same thing goes while Naruto has conversation with Kyubi, Kushina and Minato for long time! it takes several minutes but in reality it wouldn't be more than few seconds.
How is the time managed?

I think this is a not a duplicate. This question is concerned with how time seems to slow down enough for them to have a conversation, while the other question does not seem to be concerned about time.

But the answer given in the other one covers the time-lapse part as well.

@Deidara-senpai: A "duplicate question" applies to answers as well. Since one of the answers (not just one, the accepted one) contains the answer to this question in its full, it should be closed as a duplicate to avoid content duplication.

@MadaraUchiha I did not read the answer to the other question, but I read it now and you are right.

Yes the original post provided answer.. I just oversaw .. My bad .. I recommend to close it. If any admins around here.. please delete this q.

Rather than dismissing this as "artistic license", I'd rather see it as time passing differently in different dimensions, where "talking with the Kyuubi" takes place in a special dimension inside the Junchuuriki. For instance, in the Tsukuyomi technique,

Itachi's prowess with the technique has allowed him to alter the perception of time with ease within the genjutsu to make a few seconds seem like many days as a means to torture the target.

agreeable points .. accepted ..

Thanks, but this is wishful thinking that would make sense, not really official information :)

Agreed, in case of Naruto and Kurama, this is the better explanation than artistic license. But artistic license does apply in a majority of cases, such as the Sakura's 3-minute antidote, Kakashi-Zabuza fight, etc.

Flexible time is an Artistic License taken by the creators, and is generally considered acceptable since it serves to narrate the story better, and this is quite common. Quoting TVTropes:

Creators are allowed to be inaccurate if the inaccuracy serves the
  story better than accuracy would.

This feels unusual for anime adapted from the manga. In the manga, the panels are not proportional to real life time. You can use more panels to describe some events in more detail compared to others, even though they may occupy the same amount of time. In the anime, however, the frame duration is proportional to real life time, but the narration should follow the manga, which leads to this anomaly.
In the examples you mentioned, if the anime creators had to keep the times realistic, they would not be able to convey the same detail that Kishimoto-sensei included in the manga, which would make for a poorer viewing experience.
To elaborate on that point, there is another example near the start of the series, when Naruto and Sasuke team up to rescue Kakashi from Zabuza's Water Prison. Naruto then spends about 5 minutes explaining what his plan was, while Kakashi and Zabuza wait! That is entirely impossible in a real battle, but without it, the viewers would have no way of knowing what happened, and it would not be interesting to watch.

Another example is during Sakura and Chiyo's fight with Sasori, when Sakura takes an anti-dote which should last for 3 minutes. They talk for 5 minutes and then fight for another 20 minutes or so, before they run out of those 3 minutes!

And they taunt saying Deidara dosen't know art and artists! ;) :P thank you ..


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How was it possible to summon Sasori with Edo Tensei?
As we know, Sasori has

 turned his body into a puppet, with a small "core of living flesh" being the only living part of it:

This question also states that when summoned by Edo Tensei,

the reincarnated seem to retain any permanent body damage and physical
  limitations they received during their lifetime.

Obviously, Sasori would fall under someone who had suffered some physical...limitations. We know that

 after being brought back by Edo Tensei, Sasori eventually was released, and vanished like any other summoned shinobi (of flesh and bones), so it clearly wasn't another puppet:

So how was Kabuto able to summon Sasori? If the reincarnation retains body damage, wouldn't he only be able to reincarnate Sasori's "Living Core"? I doubt that the process of "enchanting", which Kabuto can perform, involves re-making the whole body.

Although the Wiki does says that

the reincarnated seem to retain any permanent body damage and physical limitations they received during their lifetime1

it also says that

Kabuto can also modify his summoned fighters (...). While the technique usually reincarnates the deceased at the exact state they were in at the time of their deaths, Kabuto noted that he brought Madara back in a state that was "beyond his prime" and was reincarnated much younger than when he died an old man as well as instilling him with abilities he had acquired in his old age.

The best explanation (I can come up with) for this is that he was reincarnated into an earlier body, maintaining the abilities and memories acquired until the time of his death, much like Madara's reincarnation 2. Although I don't think he needs to re-make the bodies of the summoned, if it meant that, it was already proven that he could do it (it was made with Madara), so it would also be possible to make it with Sasori.

1 This piece of data is stated in the Wiki, but I do not recall if it was referenced in any manga chapter, so bear that in mind.
2 Naruto chapter 560, page 3. Kabuto explains Madara that he brought him beyond his prime.

So do you mean that (to some extent) Kabuto is able to chose at which age will someone be summoned? Because after reading the "enchantments" part for the first time, I thought it is rather like "summon an old shinobi -> perform some technique, or maybe surgery -> get a young shinobi".

@SingerOfTheFall: Also compare this: http://anime.stackexchange.com/questions/612/at-which-age-are-ninjas-revived-with-edo-tensei

The impression I get is that he is able to choose it, as a part of the Edo Tensei itself. Perhaps when he does the summoning contract for each soul he chooses it. I am not sure, but this is the impression I get. :D

@looper, I have seen that, I even linked it in my question ;)

@SingerOfTheFall: OMG, I didn't see that :D.

please include manga references...

@MozenRath: I've stated my reference is the Naruto Wiki page on Edo Tensei.

@JNat I asked for Manga references.. not wiki references. we tend to loose context where that information actually came from if we just rely on wiki references. Next thing you know we start getting unreliable references and the site credibility is hurt.

@MozenRath: I cite my references, and then it is up to the reader to trust them or not. I have no manga nor databook references. The Wiki does not cite manga nor databook references either in this specific matter. But I'll add a note on that in the answer. Also, if you think the answer is untrustworthy downvote it, as it would not be useful.

I was just trying to get more out of the same answer I guess but I strongly think that references should be from manga/anime

Kabuto only needs small parts of a person's body to perform this jutsu, just enough DNA to transfer the soul to a new body. You can see that Sasori's core has some blood veins which will give kabuto the chance to obtain his DNA and perform the jutsu. More info from the wiki on the Impure World Reincarnation jutsu:

To perform this technique, the user must first acquire some of the DNA
  of the person they intend to reincarnate. Kabuto remarks that this
  basically amounts to grave-robbing, although blood stains or organs
  salvaged after the target's death also work.

I also think that that wiki reference is incorrect as I haven't seen proof of any of the resurrected ninjas displaying any of their injuries which they had while they were alive. However this can also be because when they are under this jutsu they are essentially immortal, regenerate quickly, have near-unlimited chakra and regrow limbs.

Edo tensei uses corpses and puts the soul of the dead person in. In the fight between Kankuro's team and Edo Tensei Sasori and Edo Tensei Deidara, Kankuro has Sasori's puppet body and Sasori's soul is hosted in another body. The corpse which Sasori's soul is in can be seen when he crumbles away.

I've seen this somewhere online before

I can't find good answers but it is possible that Sasori infused his chakra into his puppet body, and continuous usage of the body as his own, coupled with his own memories of the human body, might have imprinted this body into his consciousness. Well this is "mystical speculation" but it's better than a certain funny answer I found: "Plot no Jutsu".

if u cant find good answers then don't answer. btw not ur downvoter

Ok, noted. I thought there would be no other answer possible though, because I mistakenly thought that the revived Sasori was in his puppet body but apparently he was in his human body.

Sorry about the lack of comment but I was on my tablet and didn't want to type anything of length with it.  I was your downvoter and it was for the reason MozenRath gave.  Also, speculation doesn't constitute a solid answer so unless it can be backed up with references then I'd keep it out of the Q&A portion of the site.  If you'd like to speculate with other users, gather resources, and work towards an answer, chat is a great place for that.  I know there are plenty of Naruto fans on the site that could go back and forth with you for awhile on this topic (myself included).

I'm pretty sure Sasori's soul was still inactive, hence making him practically dead, allowing edo-tensei to take place. A question however could arise such as 'How can Sasori be resurrected if Kabuto didn't have his DNA?' Maybe he got his hands on Lady Chiyo's DNA and ...
Well, Sasori's Grandma so yeah!