Demon Slayer: Kimetsu no Yaiba – The Movie: Infinity Castle (Japanese: 劇場版 鬼滅の刃 無限城編, Hepburn: Gekijō-ban Kimetsu no Yaiba: Mugen-jō-hen) is an upcoming Japanese animated dark fantasy action film. Based on the "Infinity Castle" arc of the 2016–20 manga series Demon Slayer: Kimetsu no Yaiba by Koyoharu Gotouge. It is a direct sequel to the fourth season of the anime television series of the same name. The story follows demon hunter Tanjiro Kamado in his pursuit to defeat the progenitor of demons Muzan Kibutsuji. Aided by whole of the Demon Slayer Corps, Tanjiro and his friends must navigate the complex domain of Muzan's Infinity Castle headquarters to finally kill him once and for all.

Aniplex and Toho will release the film in Japan on July 18, 2025. In North America, Crunchyroll is releasing it through Sony Pictures Releasing on September 12, 2025.