Demon Slayer Infinity Castle Arc Unveils 4 Never-Before-Seen Clips — Here’s What They Reveal
On Friday, December 12, 2025, Ufotable’s Demon Slayer Infinity Castle Arc movie dropped its seventh character spot, zeroing in on former Slayer and Upper Rank Six demon Kaigaku. The promo serves up fresh film-cut footage from his heated fight, cranking the hype even higher.
Ufotable is still feeding the hype machine for Demon Slayer: Infinity Castle Arc Part 1, and this week the spotlight lands on a very loud ex-Slayer with a chip on his shoulder: Kaigaku.
Kaigaku gets his own character promo
On Friday, December 12, 2025, the studio dropped the seventh entry in its weekly character commercial series, and it is all about Kaigaku, the Upper Rank Six demon who used to train alongside Zenitsu. The new spot pulls straight from the film, focusing on his showdown with Zenitsu and putting Kaigaku’s superiority complex front and center.
"I am Special! Unlike You!"
Yep, that line made the cut. Along with the video, ufotable also pushed out four fresh stills, including a look at Kaigaku back when he was still human. If you were wondering whether they’d show that side of him in the movie, consider this your answer.
Quick refresher: who Kaigaku is and why he matters
Before he was Upper Rank Six in Muzan’s Twelve Kizuki, Kaigaku was a Demon Slayer trainee under former Hashira Jigoro Kuwajima, studying alongside Zenitsu. Zenitsu looked up to him; Kaigaku did not return the favor. He eventually betrayed the Corps, became a demon, and climbed the ranks fast.
When word of Kaigaku’s turn got back to Jigoro, the old master couldn’t live with the dishonor and took his own life. That crushed Zenitsu, and it also gave him a mission: find Kaigaku and make it right. Their fight in Infinity Castle isn’t just another flashy matchup — it’s the core of Zenitsu’s growth, showing him colder, calmer, and laser-focused in a way we haven’t really seen before. Kaigaku, as ever, stays cocky. That contrast is the point.
Where this lands in the movie
The first film in the Infinity Castle trilogy — Part 1: Akaza’s Return — packs several big clashes. Alongside Zenitsu vs. Kaigaku, there’s Doma vs. Shinobu and the two-on-one with Tanjiro and Giyu taking on Akaza. The Kaigaku fight is the one that turns the screws on Zenitsu’s arc, though, which is why this promo exists.
The rollout and the basics, all in one place
- Promo date: Friday, December 12, 2025
- Focus: Kaigaku (Upper Rank Six, ex-Demon Slayer)
- What’s in the video: scenes from the Kaigaku vs. Zenitsu fight in the film, including the "I am Special! Unlike You!" line
- New images: four stills, one of them showing Kaigaku as a human
- This is part of ufotable’s weekly character-commercial run; past spotlights: Tanjiro Kamado, Giyu Tomioka, Shinobu Kocho, Zenitsu Agatsuma, Akaza, and Doma — Kaigaku is the seventh
- Film title: Demon Slayer Infinity Castle Arc Part 1: Akaza’s Return
- Studio: ufotable
- Genres: dark fantasy, action, adventure
- Theatrical release: July 18, 2025 in Japan; global rollout started September 12, 2025
- Status: still in theaters
- Ratings snapshot: IMDb 8.5/10; MyAnimeList 8.70/10
- Streaming window: expected January/February 2026; Crunchyroll is in the mix, with Netflix also mentioned
Bottom line
If you’re tracking the weekly promos, this one does exactly what it should: teases the Zenitsu/Kaigaku grudge match, nods at Kaigaku’s past, and keeps the drumbeat going as the movie plays out in theaters. My guess on who gets the next spotlight? We’re due for a curveball — but I won’t complain if it’s Muzan.