It contains new music and an all new anime original episode which takes place immediately before the main story.

[1][2] The second part, titled Demon Slayer: Kimetsu no Yaiba – Entertainment District Arc,[b] aired eleven episodes from December 5, 2021, to February 13, 2022.

"Entertainment District" takes place after the previous mission, where they assist Sound Hashira Tengen Uzui to investigate the disappearances of Tengen's wives while gathering information about a demon who terrorizes the red-light districts of Yoshiwara.

As is originally the case in the Mugen Train film, "Homura" (炎, Flame) is used as the ending theme for episode 7.

[8] In October 2023, it was announced that the English dub of Mugen Train Arc would broadcast on Adult Swim's Toonami programming block which aired from November 12 to December 17 of the same year.