The highly anticipated third season of the popular crossover anime series Isekai Quartet is set to premiere on October 13, 2025. The announcement came via a main promotional video and key visual revealed during the “Isekai Quartet 3 ~Nama Hōsō 10-Jikan-me~” livestream on Thursday, which also showcased the theme song artists for the upcoming season.
New Season Debuts October 13 Across Multiple Platforms
Isekai Quartet 3 will begin its broadcast in Japan on October 13, airing on Tokyo MX and simultaneously streaming on the d Anime Store service at 10:30 p.m. JST. Following its initial debut, the anime will also air on BS11 at 11:30 p.m. JST, MBS on October 14, and AT-X on October 17. Additional streaming services are slated to begin distributing the series starting October 16.
Theme Song Artists Revealed for “Isekai Concerto” and “Kimi Iro, Boku Iro”
The main promotional video offered a first listen to both the opening and ending theme songs for the new season. The opening theme, titled “Isekai Concerto,” will be performed by a quartet of lead voice actors from the featured franchises: Satoshi Hino as Ainz (from Overlord), Jun Fukushima as Kazuma (from KONOSUBA), Yūsuke Kobayashi as Subaru (from Re:ZERO -Starting Life in Another World-), and Aoi Yūki as Tanya (from Saga of Tanya the Evil).
For the ending theme, “Kimi Iro, Boku Iro” (Your Color, My Color), the series welcomes back Konomi Suzuki and Kashitarō Itō. Both artists previously collaborated on the theme song “Melodic Road Movie” for the Isekai Quartet The Movie: Another World film. Digital releases for both new songs are scheduled for October 14.
Expanding the Crossover: The Eminence in Shadow Joins the Ranks
Season 3 continues the tradition of bringing together beloved characters from various Kadokawa-published isekai franchises in a chibi-style school setting. This season will notably introduce characters from The Eminence in Shadow, adding new dynamics to the already chaotic classroom.
Returning franchises include fan favorites such as Overlord, KONOSUBA -God’s blessing on this wonderful world!, Re:ZERO -Starting Life in Another World-, Saga of Tanya the Evil, and The Rising of The Shield Hero. A teaser image released earlier featured chibi versions of Shadow, Ainz, Naofumi, Kazuma, Tanya, and Subaru.
Returning Staff and Production Details
The core production team from previous seasons and the movie will return for Isekai Quartet 3. Minoru Ashina is once again helming the project as director and scriptwriter at Studio Puyukai. Minoru Takehara is credited with character designs and serving as chief animation director, while Ruka Kawada will compose the music.
The Isekai Quartet series first premiered in April 2019, followed by a second season in January 2020. The anime film, Isekai Quartet The Movie: Another World, debuted in June 2022. Crunchyroll currently streams the previous seasons and the movie.
