Studio 4°C, renowned for its visually stunning and innovative anime films like Tekkonkinkreet and Children of the Sea, is gearing up to release its latest original anime feature, ChaO. A teaser video, key visual, and cast details have been revealed, announcing the film’s theatrical debut in Japan on August 15, 2025. ChaO tells a heartwarming “100% pure love story” between a human and a mermaid in a future where their worlds intertwine.
A Tale of Two Worlds: Humans and Mermaids in ChaO
ChaO is set in a futuristic society where humans and mermaids coexist. The story revolves around Stefan, an ordinary office worker at a shipbuilding company, who finds his life turned upside down when he receives a sudden marriage proposal from ChaO, a princess of the mermaid kingdom. This sets the stage for a unique and enchanting love story that transcends cultural and racial boundaries.
A Synopsis of Love and Miracles
The official synopsis describes ChaO as a story of love and miracles, highlighting the pure and honest connection between Stefan and ChaO. As Stefan finds himself drawn to ChaO’s genuine affection, the film promises to explore the challenges and joys of their cross-species relationship.
The Cast and Crew Behind ChaO‘s Enchanting World
The film boasts a talented cast and crew, bringing together experienced animators and voice actors to create the world of ChaO.
The Leading Voices: Ouji Suzuka and Anna Yamada
- Ouji Suzuka voices Stefan, the human protagonist and salaryman. Suzuka is known for his roles in live-action series like silent and the Netflix drama Kimi ni Todoke, and previously voiced the lead in the anime film The Tunnel to Summer, the Exit of Goodbyes.
- Anna Yamada lends her voice to ChaO, the mermaid princess. Yamada is famous for her role as Asirpa in the Golden Kamuy live-action series. While she had a guest voice appearance in Detective Conan: The Eleventh Striker, ChaO marks her first time voicing a main character in an anime feature film.
The Creative Team
- Director: Yasuhiro Aoki (Kimagure Robot, Tweeny Witches)
- Character Designer & Chief Animation Director: Hirokazu Kojima (Deadman Wonderland, Coyote Ragtime Show)
- Art Director: Hiroshi Takiguchi (Weathering With You, The Case of Hana & Alice)
- Music: Takatsugu Muramatsu (Mary and The Witch’s Flower, Phoenix: Eden17)
- Distribution: Toei
Studio 4°C: A Legacy of Innovation and Artistry
Studio 4°C, founded in 1986 by Eiko Tanaka and Kōji Morimoto, has consistently pushed the boundaries of anime filmmaking. The studio’s name reflects its commitment to depth and substance, drawing inspiration from the temperature at which water is most dense.
Notable Works by Studio 4°C
Studio 4°C has produced a diverse range of acclaimed anime, including:
- Memories (1995)
- Spriggan (1998)
- Mind Game (2004)
- Tekkonkinkreet (2006)
- Children of the Sea (2019)
- Poupelle of Chimney Town (2020)
A Labor of Love: Seven Years in the Making
According to reports, Studio 4°C has been secretly working on ChaO for the past Seven Years. Producer Eiko Tanaka revealed that the film is entirely hand-drawn, featuring over 100,000 drawings, showcasing the studio’s dedication to traditional animation techniques.
What to Expect from ChaO
ChaO promises to be a visually stunning and emotionally resonant film that explores themes of love, acceptance, and cultural understanding. With its unique blend of science fiction and fantasy, combined with Studio 4°C’s signature artistic style, ChaO is poised to captivate audiences and leave a lasting impression. The film’s focus on a “pure love story” suggests a heartwarming narrative that will appeal to viewers of all ages.
