Amazon’s Prime Video has officially announced that it will stream the highly anticipated TV anime series “A Star Brighter Than the Sun” worldwide, beginning October 2, 2025, simultaneously with its Japanese premiere. The global streaming deal includes multiple dub languages, expanding the reach of this shojo romance adaptation.
A Global Premiere for a Beloved Romance
The worldwide streaming initiative by Prime Video highlights the growing international appeal of Japanese animation and the platform’s commitment to bringing diverse content to its global audience. Fans outside of Japan will be able to enjoy the series with English, German, Spanish (Spain), Spanish (Latin America), French, Italian, Portuguese (Brazil), and Thai dubs, alongside the original Japanese audio. The anime made its world premiere at Anime Expo in July.
What is “A Star Brighter Than the Sun”?
“A Star Brighter Than the Sun,” known in Japan as “Taiyou yori mo Mabushii Hoshi,” is an adaptation of the popular romance manga series by Kazune Kawahara. The manga began serialization in Shueisha’s Bessatsu Margaret on June 11, 2021, and has released 12 volumes as of August 2025. VIZ Media licensed the manga for English release in May 2024, with the third volume released on September 2, 2025.
Synopsis and Plot Details
The story centers on Sae Iwata, a slightly tougher-than-average girl, who develops feelings for Koki Kamishiro, a gentle boy, during their elementary school years. As they enter junior high, Koki transforms into a charming and popular teen, seemingly out of Sae’s reach. However, when they are assigned to the sports festival committee together, Sae’s long-hidden first love for Koki begins to rekindle.
Production Team and Cast
Studio KAI, known for works like Super Cub and Uma Musume Pretty Derby, is handling the animation production for “A Star Brighter Than the Sun.” The series is directed by Aya Kobayashi, with Yasuhiro Nakanishi (“Toilet-Bound Hanako-kun”) serving as the series screenwriter. Music is composed by Miki Sakurai (“The Quintessential Quintuplets”) and Natsumi Tabuchi (“Nina the Starry Bride”).
The main 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 performs the ending theme song “Saishin-wa.”
The Significance for Anime Fans
“A Star Brighter Than the Sun” is anticipated to be a standout shojo romance release for the Fall 2025 anime season, building on its already established fanbase from the manga. The decision by Amazon Prime Video to stream the series worldwide with multiple language options on the same day as its Japanese broadcast signifies a continued effort to make anime more accessible to a global audience and reflects the genre’s surging popularity. Anime fans can look forward to diving into this heartfelt high school romance as it unfolds on Prime Video starting October 2.
