Nakagawa, a train expert, decided Mugen Train is a Class 8620 locomotive. But an expert in animation would not confirm that claim.

After Demon Slayer: Kimetsu no Yaiba the Movie: Mugen Train (also called Infinity Train) first premiered in 2020, it topped Japan’s box office, becoming the highest grossing film of all time ...

The Demon Slayer: Mugen Train Arc movie was first released in theaters in 2020. The film follows the show’s debut season, as Tanjiro, Inosuke, and Zenitsu teamed up with the flame Hashira, Rengoku.