
Ichigo begins his Jinzen meditation in the Dangai while Isshin anchors the walls to hold back the Koryu and buy him time. In Karakura Town, Keigo reunites with Tatsuki, and Aizen and Gin reach the outskirts of the sleeping town.
As Ichigo attempts to meditate, Isshin swings at him, then scolds him for losing focus and being unable to reach his own Zanpakuto. Ichigo admits he has never entered his inner world through relaxation and does not understand the process. In an earlier explanation, Isshin describes the Dangai as an isolated space wrapped in stacked layers of time's current, where time runs so dense that a single year inside equals two thousand outside.
Isshin warns that the Koryu will trap and kill anyone it catches, while the Kototsu flings victims into a distant era, and credits Urahara's technology for sparing Ichigo and the other Ryoka during their original crossing. With the Kototsu destroyed, he seizes the opening, revealing a method called Kaikyo Kotei to halt the Koryu. He fastens four small forked blades to himself and drives them into the walls, pledging to restrain the current for roughly two thousand hours so Ichigo can learn the Final Getsuga Tensho from his blade.
Settling his son back into position, Isshin names the technique Jinzen and explains its workings. In Karakura Town, Keigo runs among sleeping residents until Tatsuki strikes him and hushes him; the two carry the unconscious Chizuru and Michiru toward their school, guessing the strange events involve Ichigo. On the town's edge, Aizen tells Gin the place clashes with Soul Society's scenery and predicts it will be their final glimpse of both. Back in the Dangai, Isshin spots a wound on Ichigo's shoulder and warns that Zangetsu will be on a rampage this time.
Isshin explains the Dangai's extreme time dilation and uses Kaikyo Kotei, anchoring forked blades to hold back the Koryu for about two thousand hours. Ichigo enters Jinzen to seek the Final Getsuga Tensho, while Aizen and Gin arrive at the edge of the sleeping Karakura Town.

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In Deicide 10, Isshin describes the Dangai as an isolated space wrapped in stacked layers of time's current, where time runs so dense that a single year spent inside equals two thousand outside. This makes it a place to train Ichigo quickly.
Isshin uses a method called Kaikyo Kotei to halt the Koryu. He fastens four small forked blades to himself and drives them into the walls, pledging to restrain the current for roughly two thousand hours.
Jinzen is the meditation technique Isshin names and explains in Deicide 10, which Ichigo enters to seek the Final Getsuga Tensho from his blade. Ichigo struggles at first because he has never entered his inner world through relaxation.
Isshin warns that the Koryu will trap and kill anyone it catches, while the Kototsu flings its victims into a distant era. He credits Urahara's technology for sparing Ichigo and the other Ryoka during their original crossing.
Chapter 408, Deicide 10, belongs to the Deicide arc of the forty-seventh volume, END OF THE CHRYSALIS AGE. It details the mechanics of the Dangai and Jinzen, and was adapted into anime Episode 302, The Final Getsuga Tensho!? Ichigo's Training!
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View on FandomThis content is original writing by Daddy Jim Headquarters based on the Bleach anime series, manga, and official materials. Episode and chapter references are cited where applicable.
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