The 37th chapter of Chainsaw Man drops the brawl between Denji and Katana Man onto a moving train, where Denji loses both arms yet wins the fight by hiding a fatal cut behind his opponent's rage.
Summary
Still locked together in midair, Denji and Katana Man keep dropping until Denji is shoved free and slams down onto a speeding train. He steadies himself in time to parry the descending Katana Man, and the collision throws them both into a packed passenger car. As terrified riders pour out and an announcement signals an emergency stop, Denji spots a hurt young woman stranded on the floor. He blocks a strike to shield her, sacrificing an arm, and snaps that the move should be outlawed as she escapes.
Key Events
Katana Man severs Denji's remaining arm and insists he apologize for the Old Man and surrender to death. Denji holds firm, noting the chainsaw on his head still lets him fight, but the next clash shatters that blade. As Katana Man again offers a quick end for an apology, Denji reveals his foe was too consumed by fury to notice he had already been cut clean down the middle. Caught off guard for an instant, Katana Man collapses into a heap of blood and organs. Watching him fall apart, Denji echoes Kishibe's lesson that prey should never believe a hunter's words.
Notes
Known in Japanese as Densha Atama Chensō, the chapter appeared in 2019 Issue 41 on September 9, 2019, within Volume 5 of the Katana Man arc. The fight was adapted in anime Episode 12. The Debt Collector is mentioned but does not appear on the page.
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Frequently Asked Questions
How does Denji beat Katana Man in Chapter 37?
Denji wins by hiding a fatal cut behind his opponent's rage; Katana Man is too consumed by fury to notice he has already been sliced clean down the middle, and he collapses into a heap of blood and organs.
What happens in Chainsaw Man Chapter 37?
Chapter 37, titled Train, Head, Chainsaw, drops the brawl between Denji and Katana Man onto a moving train, where Denji loses both arms yet still secures the kill.
Does Denji lose his arms in Chapter 37?
Yes. Denji sacrifices one arm shielding a hurt passenger, and Katana Man severs his remaining arm, leaving him to keep fighting with the chainsaw on his head.
What lesson does Denji recall after defeating Katana Man?
Watching Katana Man fall apart, Denji echoes Kishibe's lesson that prey should never believe a hunter's words.
Which anime episode adapts Chapter 37?
Chapter 37 is a Volume 5 entry in the Katana Man arc, and the fight was adapted in Episode 12 of the anime.
Sources & Information
Looking for more on Train, Head, Chainsaw? The Chainsaw Man Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the Chainsaw Man 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:
- Movie pages: theatrical posters and key visuals, credited to MAPPA and the Chainsaw Man Movie Project.
- Game pages: official promotional artwork, credited to the licensed publishers.
- Manga chapter pages: Jump Comics volume covers, credited to Shueisha and Tatsuki Fujimoto.
Official resources:
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