

Shinobi using Rasengan can often use it more times in a battle as compared to
a shinobi using Chidori. Kakashi on one hand, could only use Chidori upto a
maximum of four times a day in Part 1. Naruto, however, even when he is using
Shadow clones (meaning that he would have only a fraction of the chakra he
normally has) still has no trouble using the Rasengan more than that and still
have plenty of chakra.

The Rasengan is almost equally, if not more, powerful than the Chidori. So the
Rasengan should require the same or more amount of chakra than the Chidori.
Naruto is also said to be very inefficient in using jutsu. So even though he
has more chakra than Kakashi, his Rasengan would be less efficient than
Kakashi's Chidori. I do not believe that Naruto chakra levels are so vast,
that even with the use of shadow clones and being inefficient while using
jutsu, he can use it multiple times while still retaining plenty of chakra.

So why can Naruto use the Rasengan more than Kakashi using the Chidori?


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naruto
Why can Naruto use Rasengan more than Kakashi using Chidori?


If I recall correctly, at one time, Kakashi commented that Naruto's chakra is
about 4 times of what he has. With addition to Kyuubi's chakra, Naruto has
about 100 times what Kakashi has. Suppose that Kakashi's chakra is 4, Chidori
then costs 1 chakra for each use. Naruto has 4 times what Kakashi has so he
has 16. Kage Bunshin actually costs small amount of chakra. The problem with
Kage Bunshin is that it splits the chakra of the user which makes it appear as
if it costs a lot.

But, when the jutsu is cancelled either by when the Bunshin gets hit, or the
caster cancels it, the chakra comes back to the caster along with its
experience. Suppose that Naruto doesn't cancel and re-cast Kage Bunshin, there
won't be additional chakra cost for casting the jutsu.

Chidori cost = 1

Rasengan cost = 1

Kage Bunshin cost = 0.5 <\- assuming it cost lower than Rasengan

Kakashi Chakra = 4

Naruto Chakra = 16

Inefficient chakra usage modifier = 200% (was 125% but changed as per
ThatOneGuys's comment)

Kakashi Max Chidori = 4 / 1 = 4

Naruto Max Rasengan = (16 - 0.5 * 200%) / (1 x 200%) = 15 / 2 = 7.5 -> 7
(rounded down)

Without using Kyuubi's chakra, Naruto can do about 2 times more Rasengan than
Kakashi can use Chidori. With Kyuubi's chakra, Naruto would be able to do
about 100 times more. Of course, since with the training Naruto improved his
chakra control, the current Naruto can do more Rasengan than this simple
calculation shows.

The reference about Naruto's and Kakashi's chakra pool size and the fact about
Kage Bunshin splitting the user's chakra and returning it when the jutsu was
cancelled is from the episode where Kakashi train Naruto to develop Rasen
Shuriken.


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Naruto not only has a natural vast chakra pool but he has even the Kyuubi
supliying him with nearly unlimited chakra amounts.

> and even Kakashi could use the Rasengan pretty easily

Even if in the manga and anime it is stated that Naruto's chakra managament is
poor

> because the seal on his belly

After a lot of training and getting rid of some limitations, he improved his
chakra management vastly and even learned how to recover chakra in combat.

> thanks to the Sage mode

Plus, it is stated multiple times in the manga/anime that the Rasengan, even
though it uses a lot of chakra, isn't comparable on the amount of chakra the
Chidori uses. Chakra bending is a lot less taxing than giving an elemental
nature to a bending

> Naruto's Rasenshuriken is a Rasengan imbued with his Wind element.


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I guess that naruto's humongous power comes from the nine tails chakra that is
sealed within him and due to this naruto obviously has more chakra than
kakashi due to which he can do more rasengan than kakashi can do chidori


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Well Kakashi was making a rough estimate when comparing Naruto's chakra to his
own. First of all by part 2 I'm pretty sure Kakashi's chakra pool had grown to
the point that he could make 6 lightning blades each day or a little more.
Plus Rasengan was never said to take up a lot of chakra. Giant Rasengan was
stated to take up more chakra because of its density so I think a lightning
blade could be comparable to a giant Rasengan. But even then Naruto clearly
has more than 4 times Kakashi's chakra. He has made dozens of clones and each
could have done multiple Rasengans.

Plus by the time Naruto learns sage mode, Naruto could have done around 6
Rasenshurikens with other Rasengan variants and still not seem to have any
noticeable chakra fatigue. I would say Naruto's chakra reserve is at least 6-8
times that of Kakashi's for him to be able to do so many Rasenshurikens when
they take up a lot more chakra than a lightning blade.


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It's because The rasengan is an incomplete jutsu. And naruto was the one to
perfect it. His dad invented it but never mastered it


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It's because Naruto generally has more chakra; thus can use more jutsu than
Kakashi, whos chakra reserves have been getting cut after the fourth war.
Naruto has been able to use multiple variants of Rasengan and Rasen-Shuriken
more than Kakashi can use a normal Chidori, and its because Naruto's chakra
reserves are simply larger than Kakashi's.


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