Demon Slayer: Kimetsu no Yaiba Infinity Castle

Demon Slayer: Kimetsu no Yaiba Infinity Castle continues directly after the Hashira Training arc. When Muzan Kibutsuji appears at the Ubuyashiki Mansion, Tanjiro Kamado and the Hashira are pulled into the demons' stronghold, the Infinity Castle, where the final confrontation begins. Infinity Castle is the first installment in a three-film theatrical trilogy produced by ufotable. It is not a standalone introduction to Demon Slayer: the story assumes viewers know Tanjiro's journey, Nezuko's transformation, and the earlier encounters with the Upper Rank demons. Watching the television arcs through Hashira Training first provides the necessary context for the battles and character relationships here.