Past Time, 4th Period is the 137th chapter of Assassination Classroom, pressing the Volume 16 flashback onward. The longest installment of the sequence, it draws both Yukimura sisters into the recollection of Korosensei's past.
Past Time, 4th Period is chapter 137, a nineteen-page installment in Volume 16 given in Japanese as Kako no jikan, 4-jikan-me. It pushes the flashback forward and brings both Yukimura sisters into its frame.
Aguri Yukimura and the Grim Reaper open the recollection, joined by Akari Yukimura, the younger sister later known as Kaede Kayano. Kotaro Yanagisawa appears once more, and a large slice of Class 3-E, from Nagisa Shiota and Yuma Isogai to Manami Okuda and Ryoma Terasaka, populates the flashback.

Naruto vs Luffy with the twist nobody asked for: Luffy tickled Hinata on date night, and she kind of liked it. We break down the whole fight and commit to a winner....

There are no women on Namek. That isn't an oversight, it's the biology. Why we handed Piccolo the one thing his own species rules out, and why it had to be trap soul....
Past Time, 4th Period is chapter 137 of Assassination Classroom, pushing the Volume 16 origin flashback forward. It is notable for bringing both Yukimura sisters into the story for the first time.
In Past Time, 4th Period, Akari Yukimura is introduced as Aguri Yukimura's younger sister, later revealed to be Kaede Kayano, one of the Class 3-E students.
Past Time, 4th Period is nineteen pages long, making it the longest chapter in the seven part Past Time flashback within Volume 16.
Past Time, 4th Period is titled Kako no jikan, 4-jikan-me in Japanese.
Past Time, 4th Period is followed by Past Time, 5th Period, continuing the flashback into Korosensei's origins.
Looking for more on Past Time, 4th Period? The Assassination Classroom Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the Assassination Classroom anime series, manga, and official materials. Assassination Classroom was created by Yusei Matsui, published by Shueisha, and animated by Lerche. All rights to Assassination Classroom and its characters belong to their respective owners. Episode and chapter references are cited where applicable.
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