Kimetsu no Yaiba: Mugen Ressha-hen
English title: Demon Slayer: Kimetsu no Yaiba Mugen Train Arc
Japanese title: 鬼滅の刃 無限列車編
Alternative titles: Kimetsu no Yaiba Movie: Mugen Ressha-hen (TV)
Type: TV
Source: Manga
Episodes: 7
Status: Finished Airing
Aired: Oct 10, 2021 to Nov 28, 2021
Broadcast: Sundays at 23:15 (JST)
Duration: 24 min per ep
Rating: R - 17+ (violence & profanity)
Studios: ufotable
Producers: Aniplex, Shueisha
Genres: Action, Supernatural
Themes: Historical
Demographics: Shounen

A mysterious string of disappearances on a certain train has caught the attention of the Demon Slayer Corps, and they have sent one of their best to exterminate what can only be a demon responsible. However, the plan to board the Mugen Train is delayed by a lesser demon who is terrorizing the mechanics and targeting a kind, elderly woman and her granddaughter. Kyoujurou Rengoku, the Flame Hashira, must eliminate the threat before boarding the train.

Sent to assist the Hashira, Tanjirou Kamado, Inosuke Hashira, and Zenitsu Agatsuma enter the train prepared to fight. But their monstrous target already has a devious plan in store for them and the two hundred passengers: by delving deep into their consciousness, the demon intends to obliterate everyone in a stunning display of the power held by the Twelve Kizuki. 

[Written by MAL Rewrite]

Mugen Ressha-hen adapts chapters 54 to 66 of the manga. The first episode is original to the anime.