Demon Slayer: Infinity Castle Movie Review (2025) – Akaza Returns

Demon Slayer: Kimetsu no Yaiba – The Movie: Infinity Castle is the most anticipated anime film of 2025. Adapted from the iconic Infinity Castle arc, this film directed by Haruo Sotozaki and produced by Ufotable continues the saga after the anime’s fourth season. With record-breaking box office success, breathtaking animation, and emotional storylines, here’s our complete review.

Quick Facts

• Title: Demon Slayer: Infinity Castle – Part 1: Akaza Returns
• Release Date (Japan): July 18, 2025
• Running Time: 155 minutes
• Director: Haruo Sotozaki
• Studio: Ufotable
• Music: Yuki Kajiura & Go Shiina
• Box Office: $294 million (38 days)

Plot Summary (Spoiler-Free)

Tanjiro Kamado and the Demon Slayer Corps are drawn into Muzan Kibutsuji’s terrifying dimensional fortress — the Infinity Castle. Separated and trapped within its shifting walls, the slayers must confront the most powerful Upper Rank demons yet. This movie delivers intense battles, emotional sacrifices, and major turning points that fans of the manga have long awaited.

Major Story Highlights (Spoilers Ahead)

Shinobu vs. Doma

Shinobu Kocho confronts Doma, the demon who killed her sister. Despite her mastery of poisons, Doma adapts and overpowers her, ending her life. Her death sparks Kanao’s determination to continue the fight.

Zenitsu vs. Kaigaku

Zenitsu faces his corrupted senior, Kaigaku. By unleashing a Seventh Form of Thunder Breathing of his own design, Zenitsu earns victory and closure, proving himself to his late master.

Tanjiro & Giyu vs. Akaza

In one of the most emotional duels, Tanjiro and Giyu battle Akaza. By entering the Transparent World, Tanjiro unlocks new perception and lands the decisive blow. Akaza’s human past resurfaces, leading him to accept his sins and embrace redemption.

Animation & Soundtrack

Ufotable’s work is nothing short of stunning. The fluid choreography, dramatic perspectives, and color palettes create unmatched cinematic moments. The soundtrack by Yuki Kajiura and Go Shiina elevates every battle, with Aimer’s “A World Where the Sun Never Rises” and LiSA’s “Shine in the Cruel Night” cementing the film’s emotional depth.

Release & Box Office

Premiering on July 18, 2025, Infinity Castle grossed over $294 million worldwide within 38 days. It became Japan’s highest-grossing film of the year and the third highest-grossing anime film of all time.

Critical Reception

Fans praised the animation and emotional arcs. Critics noted pacing challenges due to heavy flashbacks. Overall, the film balances spectacle and tragedy, setting the stage for the trilogy’s continuation.

Final Verdict

Demon Slayer Infinity Castle – Part 1: Akaza Returns is an emotional and visually breathtaking installment. With its flawless animation, unforgettable battles, and record-breaking success, it is a must-watch for every anime fan.

Rating: ★★★★☆ (4.5/5)

Frequently Asked Questions (FAQ)

Is Infinity Castle a standalone film?

No. It is the first of a planned trilogy adapting the Infinity Castle arc.

Do I need to watch previous Demon Slayer movies first?

Yes. Watching Mugen Train, Swordsmith Village, and Hashira Training helps provide full story context.

When is the international release?

The international rollout spans August–September 2025, distributed by Crunchyroll.