By 
Kenshi Yonezu won’t just be contributing the song “Iris Out” as a theme song for the Chainsaw Man: Reze Arc movie, as the official social media account for the series revealed that he’ll also sing the theme song “Jane Doe” with Hikaru Utada for the film. The full track isn’t available yet. Mappa only shared about a 30 second teaser for it on YouTube.
Here’s the latest clip. As with other trailers, some animations from the movie also appear. While we do hear a bit of Hikaru Utada’s voice toward the end of it, we don’t get to hear either performer actually sing or get a hint at the lyrics for the track. It does seem like it is a slower-paced piano theme, compared to other Chainsaw Man theme songs.
Here’s the Chainsaw Man: Reze Arc movie theme song teaser for the Kenshi Yonezu and Hikaru Utada song “Jane Doe.”
We already heard a bit of the other song Kenshi Yonezu sang for Chainsaw Man: Reze Arc, as it appeared in the last movie trailer shared in July 2025. In case you missed it, you can hear it in the background over this footage from the film.
Chainsaw Man the Movie: Reze Arc will debut in Japan on September 19, 2025, and it will appear in US theaters in English on October 29, 2025. The anime is streaming on Crunchyroll, and Viz Media handles the manga outside Japan.
