Amazon Prime Video has announced it will stream the highly anticipated TV anime series, “A Star Brighter Than the Sun” (Taiyō Yori mo Mabushii Hoshi), worldwide beginning October 2, 2025. This global release will coincide with the anime’s premiere date in Japan.
The romantic comedy, based on Kazune Kawahara’s popular manga, is set to be a significant addition to Prime Video’s growing anime catalog.
Global Reach and Language Options
Prime Video is making a strong commitment to international audiences by offering the series with multiple dubs. Available languages for the series will include English, German, Spanish (Spain), Spanish (Latin America), French, Italian, Portuguese (Brazil), and Thai. This extensive language support underscores the platform’s strategy to cater to a diverse global viewership for anime content.
Plot Overview: A Rekindled High School Romance
“A Star Brighter Than the Sun” centers on the evolving relationship between Sae Iwata and Koki Kamishiro. Sae, described as a slightly tougher-than-average girl, developed a crush on the gentle Koki back in elementary school. By junior high, Koki had transformed into a charming and popular teen, seemingly out of Sae’s reach. Their paths converge again when they are assigned to the sports festival committee, stirring Sae’s long-hidden first love. The story explores themes of identity, acceptance, and growth against a high school backdrop filled with first loves and emotional dilemmas.
Key Production Details and Voice Cast
The anime is animated by Studio KAI, known for its work on series such as Super Cub and Uma Musume Pretty Derby. Aya Kobayashi is directing the series, with Yasuhiro Nakanishi (“Toilet-Bound Hanako-kun”) handling series scripts. Music is being composed by Miki Sakurai (“The Quintessential Quintuplets”) and Natsumi Tabuchi (“Nina the Starry Bride”).
The main Japanese voice cast includes:
- Minori Fujidera as Sae Iwata
- Yuki Ono as Koki Kamishiro
- Hina Yomiya as Hisui Onodera
- Taito Ban as Yota Ayukawa
- Mutsumi Tamura as Mio Kagawa
- Ryota Osaka as Yushin Izawa
- Haruka Shiraishi as Subaru Kamishiro
Motohiro Hata performs the opening theme song “Stellar Days,” while Wanuka is responsible for the ending theme song “Saishin-wa” (Latest Episode).
Manga’s Popularity and English Release
The anime is adapted from Kazune Kawahara’s romance manga series, which began serialization in Shueisha’s Bessatsu Margaret on June 11, 2021. As of August 2025, 12 volumes of the manga have been released. VIZ Media licensed the manga for English release in May 2024, with the first volume released on March 4 and the third on September 2. The manga’s established fanbase is expected to contribute to the anime’s success.
