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During the Arrancar war saga in Bleach, Yamamoto fought against Aizen before
the arrival of Ichigo. In the end of the fight he used a kidou that almost
killed himself tying to defeat Aizen. If I remember, this kidou uses the body
as a "fuel" for it to work.

Spoiler:

> But in the new saga, he showed his bankai against Juha Bach. And it's very
> powerful.

![enter image description here](https://i.stack.imgur.com/39rkC.png)

He said that never used his full power, why didn't he use it against Aizen? If
he underestimated him, why would he use that kidou that almost killed him and
ended up losing the fight, instead of using his bankai?


CC BY-SA 3.0
2013-09-16T18:51:29.360
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2013-09-17T16:48:48.380
2013-09-17T16:48:48.380
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question
bleach
Did Yamamoto Genryuusai use all his power aganist Aizen?


He did not use the bankai because he could not use it.

His bankai Zanka no Tachi absorbs the flames of his Ryujin Jakka into the
katana blade. During the battle in fake Karakura town, Wonderweiss absorbed
his flames. Later when the flames sealed inside Wonderweiss's body are about
to explode, Yamamoto has to shield it with his own body, which left his own
body in tatters. It is reasonable to assume that he was either in no position
to activate his bankai, or the bankai would not be strong enough since he
couldn't absorb enough flames.

If he had known Wonderweiss's abilities beforehand, he may have gone straight
to his bankai from the start.


CC BY-SA 3.0
2013-09-17T13:40:30.027
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2013-09-17T13:40:30.027
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answer