'Sora wa Akai Kawa no Hotori' Unveils Main Cast, Additional Staff, Teaser Promo

Red River Anime Reveals Key Details
The television anime adaptation of Sora wa Akai Kawa no Hotori, known in English as Red River, has recently shared significant updates regarding its production. The official website for the upcoming series released these announcements on a Tuesday, unveiling the core voice cast, several key members of the additional staff, details about the opening theme, and a new teaser promotional video. This upcoming anime series is based on Chie Shinohara's adventure fantasy manga. Viewers can look forward to its premiere in July 2026. The series is set to broadcast across NTV and BS NTV channels.
The Ensemble Cast
The main voice cast for the Sora wa Akai Kawa no Hotori anime has been officially introduced. Taking on the role of Yuri Suzuki is Mirai Tachibana, an artist known for their work in Idoly Pride. The character of Kail Mursili will be brought to life by Wataru Katou. Katou has previously lent their voice to projects such as Kimi no Koto ga Daidaidaidaidaisuki na 100-nin no Kanojo. Additionally, the anime will feature Hiroki Nanami, who will serve as both the Narrator and the voice of Himuro. Nanami's past performances include a role in Sengoku Youko. These talents are set to define the vocal landscape of the new series.
Behind the Scenes Talent
A comprehensive list of additional staff members working on the Sora wa Akai Kawa no Hotori anime has also been released. The Sound Director overseeing the auditory experience is Hiroto Morishita, recognized for their contributions to Tsue to Tsurugi no Wistoria. The musical score for the series is being composed by Yoshihisa Hirano, whose notable works include the music for Hunter x Hunter (2011). Sound production for the anime is being handled by Team Kawadon. Kousuke Kobayashi is directing the anime at Tatsunoko Production, with a notable past project being Alma-chan wa Kazoku ni Naritai. Yoriko Tomita is responsible for the series composition, having previously worked on Sono Bisque Doll wa Koi wo Suru. The character designs for the anime are being crafted by Kenji Fujisaki, who is known for their work on Blood Lad. These individuals comprise the creative team bringing the manga to the screen.
The Melodic Opening Theme
The opening theme for the Sora wa Akai Kawa no Hotori anime has been titled "Akatsuki no Sora." This theme song will be performed by Hiroki Nanami. As mentioned earlier, Hiroki Nanami is also part of the voice cast, providing the voice for the Narrator and Himuro, showcasing their multi-faceted involvement in the production.
The Manga's Legacy
The anime draws its inspiration from Chie Shinohara's historical drama shoujo manga. This original manga began its serialization in Sho-Comi magazine in January 1995. The series continued its run for several years, concluding in June 2002. Shogakukan published the 28th and final volume of the manga in July of the same year. Following its initial release, the series was reprinted in a paperback edition format. This reprint consisted of 16 volumes, which were released between October 2006 and May 2007. The manga has established a significant presence through its narrative and artwork over the years.
International Manga Availability
The adventure fantasy manga has also reached an international audience. VIZ Media acquired the English license for the manga in February 2004. Subsequently, the company embarked on publishing all 28 volumes of the series in English, a process that spanned from June 2004 to January 2010. More recently, VIZ Media commenced the release of 3-in-1 omnibus editions of the manga. These larger format volumes started shipping in October 2024. The sixth omnibus volume was released on January 20, providing a new way for readers to experience the story.
A Glimpse into the Future
A teaser promotional video has also been unveiled alongside these announcements. This video offers an early look into the animated world of Sora wa Akai Kawa no Hotori. Further details and looks at the series are anticipated as the July 2026 premiere date approaches.