Demon Slayer: Kimetsu no Yaiba - The Movie: Mugen Train

Passengers have been mysteriously vanishing aboard a haunted train, and Tanjiro Kamado and his friends are about to find out why the Demon Slayer Corps hasn't been able to fix the problem. Their guide for this mission is Kyojuro Rengoku, the Flame Hashira — a high-ranking swordsman who fights with the kind of intensity that makes you lean forward in your seat. The whole movie takes place on and around this one train, which gives it a tight, claustrophobic energy that works really well for the supernatural threat lurking onboard. This is ufotable at their absolute peak. The animation in this movie is genuinely some of the best you'll see in anime — fluid combat, gorgeous lighting, and sequences that hit harder because the studio knows exactly when to slow down and let a moment breathe. The emotional weight here catches you off guard if you're just expecting a flashy action movie. Rengoku in particular goes from cool side character to someone you deeply care about over the course of a single film, which is no small feat. If you liked Attack on Titan's blend of desperation and spectacle, or Jujutsu Kaisen's approach to balancing humor with genuinely dark stakes, this fits right in that space. It's also a great entry point if you've watched the first season of Demon Slayer and want to see the story take a more personal, emotionally grounded turn. There's a reason this became one of the highest-grossing anime films ever — it earns every bit of that reputation.