
One sitting. Kimetsu no Yaiba Movie 1: Mugenjou-hen - Akaza Sairai (Demon Slayer: Infinity Castle Arc) is a film from Summer 2025 by Ufotable, Inc.: 1 episodes, about 2.6 hours in total, finished, 8.68/10 across the listing sites.
Watching it together: one sitting. It is a film (about 2.6 hours), so the whole thing fits one evening — the easiest kind of anime to agree on. Rule: type MOVIE → one sitting.
This verdict comes from rules over the title's format, length and tags, not from a review — the rule that fired is named above.
Data from anime-offline-database (ODbL) as of 2026-07-04; the score is the median of the scores the anime listing sites give it, on a 1–10 scale. Also listed as: Demon Slayer: Kimetsu no Yaiba - The Movie: Infinity Castle - Part 1: Akaza Returns; Demon Slayer: Kimetsu no Yaiba Infinity Castle Chapter 1; Demon Slayer: Kimetsu no Yaiba - Infinity Castle - Part 1: Akaza Returns; Demon Slayer: Kimetsu no Yaiba Movie - Infinity Castle: Part 1.
Queue Up reads two public AniList lists and shows every anime you both have on Planning — with Kimetsu no Yaiba Movie 1: Mugenjou-hen - Akaza Sairai flagged if it is one of them — then picks tonight's with a weighted roll or a bracket.
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Queue Up is a free tool: enter two AniList usernames and it ranks the anime you both want to watch, rolls one for tonight, runs a bracket to settle it and finds new anime that fit both of you. List data from AniList; title data: anime-offline-database (ODbL), dataset of 2026-07-04; page updated 2026-07-04. Not affiliated with AniList or MyAnimeList. Queue Up is a Somebody Decide program. How it works · Legal & privacy · All lists