Chainsaw Man’s Reze Arc Theme Shatters Records — Kenji Yonezu’s ‘IRIS OUT’ Reigns Supreme!

Fall 2025 is now getting out of hand — and we’re not complaining! Kenji Yonezu’s “IRIS OUT”, the official theme song for the Chainsaw Man: Reze Arc, has made music history in Japan — and fans worldwide can’t stop replaying it.

As of October 29, 2025, the song has stayed No. 1 on the Billboard JAPAN Hot 100 for six consecutive weeks, surpassing Yonezu’s own legendary hit “Lemon,” which held the record for five. With this, “IRIS OUT” has officially set the longest consecutive reign record in Billboard JAPAN history — a feat that has electrified both anime and J-pop communities alike.

A Clean Sweep Across Charts

“IRIS OUT” has conquered nearly every major music ranking in Japan — and it’s showing no signs of slowing down.

Billboard JAPAN (as of Oct 29, 2025):

Overall Song Chart HOT100 — #1 (6 consecutive weeks)
Streaming Song Chart — #1 (6 consecutive weeks)
Download Song Chart — #1
Anime Song Chart — #1 (6 consecutive weeks)

Oricon (as of Nov 3, 2025):

Weekly Streaming Ranking — #1 (6 consecutive weeks)
Weekly Digital Single (Song) — #1
Weekly Karaoke Ranking — #1

In total, the song now holds a 7-crown sweep, dominating streaming, downloads, karaoke, and overall airplay simultaneously. It also reached 100 million plays faster than any Japanese track in history, proving Yonezu’s artistry still defines an era.

The Reze Arc Hype Grows Worldwide

The Chainsaw Man: Reze Arc hype isn’t just about the soundtrack — it’s a full-blown global event. With the film’s worldwide screenings rolling out from September 2025 through October, the anticipation for this arc has reached fever pitch.

The English version of the Reze Arc is set to premiere on October 29 across countries including Canada, Finalnd, Iceland, Norway & Sweden

Fans across Japan, India, the US, France, and 60+ other countries are set to experience Denji and Reze’s explosive, tragic love story on the big screen. Studio MAPPA’s dynamic visuals combined with Yonezu’s hauntingly emotional vocals make “IRIS OUT” a perfect mirror to the bittersweet tone of the Reze storyline.

And if the song’s record-breaking performance is any indicator — the movie is poised to be one of Chainsaw Man’s biggest global triumphs yet.

Synopsis — Chainsaw Man: Reze Arc

! MINOR SPOILERS AHEAD! :

The Reze Arc, also known as the Bomb Girl Arc, follows Denji as he experiences a fleeting taste of love and normalcy—only to have it ripped away in true Chainsaw Man fashion. After meeting the charming and mysterious Reze, Denji’s mundane life takes a romantic yet dangerous turn. What starts as a sweet connection soon unravels into chaos as Reze’s true identity as the Bomb Devil hybrid is revealed, sent to capture Denji’s heart—literally. This arc dives deep into themes of betrayal, innocence lost, and the human desire for freedom amidst blood-soaked carnage, making it one of the most emotional and beautifully tragic parts of the series.

As per the recent news, Chainsaw Man: Reze Arc is Verified Hot and 100% on Rotten Tomatoes – A perfect score from critics, this movie is already planning to go toe to toe with the Demon Slayer Infinity Castle Movie.