Kimetsu no Yaiba Movie 1: Mugenjou-hen - Akaza Sairai

After the Hashira Training, Muzan Kibutsuji finally reaches the Ubuyashiki estate, triggering the confrontation the Demon Slayer Corps has spent years preparing for. Muzan immediately overturns the battlefield, dragging Tanjiro, the Hashira, and the other fighters into the ever-shifting Infinity Castle, the demons’ stronghold.

The corps is scattered through corridors that refuse to stay in one shape, forcing separate battles against the strongest Upper Ranks. As Tanjiro fights to reach Muzan, Akaza appears before him again, reopening a wound that has never healed since the Mugen Train. There is no safe ground left to retreat to; the castle itself has become the battlefield for the final war.