Demon Slayer Infinity Castle Movie Review: How Good Is The Highest Grossing Anime Movie?

Pavas Gagneja
Sep 21
4 min read

Demon Slayer: Infinity Castle throws Tanjiro and all the other Demon Slayers straight into Muzan’s shifting castle, where floors tilt, rooms slide, and fights break out in every direction. It looks huge on the big screen with fast camera movement, bright Breathing Techniques, and walls flipping like a puzzle while swords clash.

It’s also a long movie that tries to do two things at once: deliver massive battles and give each major character a moment to breathe. That means big highs and some slow stretches. If the best parts of Demon Slayer are the heart and the heat, Infinity Castle brings both. Here's a review of the Demon Slayer: Infinity Castle movie, and what fans loved about it.

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What Demon Slayer: Infinity Castle Does Right?

Relentless, Character-Driven Duels

Best fights in the Demon Slayer Infinity Castle movie

The movie anchors its action on three battles, and each one hits hard because it’s tied to a personal wound. Shinobu vs. Doma is the sharpest example. Doma murdered Kanae, so every feint and dose of Wisteria Poison feels like Shinobu keeping a promise to her sister.

Then comes Zenitsu vs. Kaigaku, which brings their bitter history to the surface and finally lets Zenitsu cut through his fear. Kaigaku was the senior who abandoned their dojo’s values, and Zenitsu answers with a clean, blistering form that the film frames with a sudden drop in sound, then a thunderous crash.

Tanjiro and Giyu vs. Akaza is the power duel that breathes; Giyu’s calm Water Breathing holds the line while Tanjiro draws on Rengoku’s lessons to push past fear. The Castle itself seems to bend with each exchange, and the crowd's energy spikes when resolve becomes Tanjiro’s real weapon.

The Animation Makes It A Must-Watch

Akaza attacks Tanjiro in the Infinity Castle

The animation is fast, clear, and big-screen ready. Camera moves are smooth, sword trails are bright, and Breathing Techniques pop with strong colors. Every big duel looks different from each other, so every fight has its own style and rhythm.

The movie blends hand-drawn character work with 3D environments in a clean way. Characters feel fluid and expressive, and the sound and music boost the visuals too. It's safe to say that this is one of Ufotable's best work out there.

Infinity Castle's Design Makes The Battle Even More Interesting

Muzan activates the Infinity Castle to trap the Demon Slayers

Infinity Castle is a trap that twists everything against its intruders. We witness the floors shifting, rooms sliding, and hallways appearing or vanishing. The Infinity Castle makes every fight look new and unpredictable, while still keeping the action clear and exciting to follow.

And of course, Muzan is behind it all. He pulls the Demon Slayer Corps inside to hide from the sun and to hunt Nezuko, the only demon who can walk in daylight. That goal adds a quiet tension to every scene — the heroes have to survive the night, break free from the Castle, and drag the final fight back under the morning sun.

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Every Battle in Infinity Castle Feels Personal

The film makes space for feelings without derailing momentum. We see why Shinobu refuses to give up, why Zenitsu cannot forgive Kaigaku, and what still holds Akaza together inside all that rage. These flashbacks make the battles feel more relatable. You'll love the flashbacks, since they will appeal to you on a personal level.

Moreover, Nezuko’s presence keeps the story warm even when the Castle is cold. She doesn’t get a fight here, but she anchors Tanjiro’s decisions. The movie remembers that Tanjiro and Nezuko’s bond is the heart of Demon Slayer, so even in a maze built for killing, it finds room for care and love.

The Overall Coverage Will Keep You Hooked

Obanai and Sanemi falling into the Infinity Castle

Infinity Castle plays a character in itself. Shinobu’s fight feels like a promise kept for Kanae, Zenitsu’s lightning finally matches his growth, and Tanjiro and Giyu’s stand against Akaza will leave you asking for more. These fights were built up and ended with a bang, making the movie one of the best things that happened to anime this year.

At the same time, the movie doesn’t wrap everything up. Muzan’s trap shapes the whole battle. The Demon Slayers have one clear goal, which is to stay alive, find each other, and push him into daylight. This makes the changing Infinity Castle less about getting lost and more about following a straight path. Instead of confusion, the story builds steady excitement.

Where Demon Slayer: Infinity Castle Fell Short?

Pacing Problem

The Demon Slayer: Infinity Castle movie, while visually spectacular, faced strong criticism for its pacing. Viewers pointed out that frequent flashbacks and heavy exposition in the middle of action sequences disrupted the flow of the movie.

Instead of maintaining constant tension during the battles, the story often slowed down to explain backstories or details. Some fans even felt like the movie attempted to handle too much at once, packing the intensity of an entire season into just a 2.5-hour runtime, leaving the overall experience feeling uneven.

Character Handling Could Have Been Better

Another area where the film fell short was in its handling of characters. While a few standout battles and certain Hashira received the spotlight, others, like Inosuke, Muichiro, and Himejima, were sidelined with limited screen time and development.

This imbalance weakened the emotional weight of key story moments since some arcs felt underdeveloped compared to others. For fans who connected deeply with the broader cast in the manga, the lack of focus on important characters made the film feel incomplete and less impactful than it could have been.

Final Verdict: Does It Stand On Expectations?

As a big-screen event, Infinity Castle is nerve-racking. The sound design shakes the seats, and the fights feel designed for a packed theater holding its breath together. But is it perfect? Not quite, since the mid-movie rhythm can dip, and fans of certain Hashira may want more.

So, the final take is that the Infinity Castle is a must-watch. It delivers jaw-dropping action, real emotion, and a heavy setup for the end. If the highest grossing means the loudest and most moving night at the movies, this takes the cake — and creates urgency for the next part.