
Tenko Shimura: Origin, Part 2 is chapter 236 of My Hero Academia. Decay fires for the first time in a crying child's arms, and by the time it stops the Shimura household no longer exists, leaving the boy who caused it with something disturbingly close to relief.
Still crying in the backyard after his punishment, Tenko clutches Mon, and Decay activates for the first time without him understanding what it is. The dog comes apart in his arms, reduced to bloody scraps of meat.
He is staring at the remains in horror when Hana calls out. She tries to apologize for letting him absorb their father's anger when the office had been her idea. Tenko cannot warn her; the same phenomenon has damaged his voice. She sees her brother hurting and rushes toward him, then spots what is left of the dog and bolts in terror while he silently begs her to stay.
He catches up to her. His bare hand touches her, and she comes apart while calling for their mother. The sight makes him vomit.
Nao and the grandparents arrive to the horror of it. Tenko reaches for his mother, but his hand meets the ground, Decay races outward, and it kills all three of them by accident. Nao keeps reaching back as she falls to pieces, trying to hold and comfort him, and her body gives out before she can. The noise brings Kotaro, who finds what his son has done and can only stand and stare while Tenko begs and the ground around them dissolves.
The frantic boy runs at his father, still pleading, decaying everything he passes without meaning to. Kotaro panics, swings a pole at him in self defense, and orders him to stop. The blow trips something. Tenko attacks with full intent to kill, presses a hand to his father's face in payment for all that pain, and tells him to die. He recalls the relish he felt at ending the abuse.
The house comes apart around him, and Tomura reflects that some part of him may always have wanted an event exactly like this.
The moment Tomura's Quirk developed is shown.
The incident in which he killed his family plays out in full.
The chapter was published on July 22, 2019 in issue 34, spans fifteen pages, and opens Volume 25. Its Japanese title is 志村転弧:オリジン2, read Shimura Tenko: Orijin 2. Tenko and Hana share the cover, and Episode 111 adapts it.
Every page stays inside the flashback at the Shimura Residence, and Decay is the only Quirk on display. Six characters appear, all members of the Shimura and Magi households.

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....
In Chapter 236, Tenko Shimura's Decay Quirk activates for the first time while he is crying in the backyard, and by the end of the chapter it has killed his dog Mon, his sister Hana, his mother Nao, his grandparents, and finally his father Kotaro.
Tomura Shigaraki's Decay Quirk first appears in Chapter 236 when young Tenko, sobbing and clutching his dog Mon after being punished, unknowingly triggers it and reduces the animal to bloody remains.
Tomura Shigaraki's family died in Chapter 236 when his newly awakened Decay Quirk spread from his hands, killing his sister Hana, his mother Nao, and his grandparents by accident before he turned it on his father Kotaro on purpose.
Yes, unlike the accidental deaths of the rest of his family, Tomura Shigaraki presses his hand to his father Kotaro's face with full intent to kill in Chapter 236, telling him to die as payback for years of abuse.
My Hero Academia Chapter 236 takes place entirely within the flashback at the Shimura Residence, and Decay is the only Quirk that appears on its pages.
Looking for more on Chapter 236? The Dragon Ball Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the Dragon Ball anime series, manga, and official materials. Episode and chapter references are cited where applicable.
Character and scene imagery on this site is original artwork by Daddy Jim Headquarters, not screenshots or licensed imagery. Official cover art is used on three types of pages for editorial commentary:
Official resources:
Daddy Jim Headquarters maintains this encyclopedia. If you spot an error, a translation issue, or something that doesn't look right, let us know.