Love − Zero = Infinity

Demon Slayer: Kimetsu no Yaiba – The Movie: Infinity Castle is a 2025 Japanese animated epic 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 as well as the manga fourth, fifth, and sixth adaptations, following the film Mugen Train (2020) and the feature-length compilations To the Swordsmith Village (2023) and To the Hashira Training (2024). It is directed by Haruo Sotozaki, produced by Ufotable, and written by the studio's staff members. It follows the Demon Slayer Corps in their decisive climactic battle against Muzan Kibutsuji and the remaining Upper Ranks within the titular "Infinity Castle". Unlike the Swordsmith Village and Hashira Training adaptations, which are compilations of episodes from the anime series, Infinity Castle is a feature-length multi-film adaptation due to the arc's content and dramatic pacing, similarly to Mugen Train. It is the first film of a trilogy announced in June 2024, immediately following the airing of the fourth season's finale. It was released in Japan on July 18, 2025, by Aniplex and Toho. It was released by Crunchyroll through Sony Pictures Releasing in select Asian countries in August, before releasing in all other territories the following month. The film became the seventh-highest-grossing film of 2025, grossing $793 million worldwide, and broke numerous box office records. The film received positive reviews from critics, who praised its action sequences, visuals, and engaging story, although the pacing received some criticism. The film won numerous awards including Best Animation Film at the 49th Japan Academy Film Prize, and a record-breaking seven awards including Film of the Year at the 10th Crunchyroll Anime Awards.