ChaO (2025): cast, story & where to watch
2025 · Film · ★ 8.2
Released in 2025, ChaO is an animation, fantasy and romance film directed by Yasuhiro Aoki, running about 90 minutes.
What it’s about. In a futuristic world where humans and mermaids coexist, the life of mild-mannered office worker Stephan is upended when he is suddenly proposed to by Chao — a princess from the mermaid kingdom. With no time to make sense of what's happening, Stephan soon finds himself living with the unpredictable, wholehearted Chao, and her sincere love begins to break down his emotional barriers.
Who’s in it. ChaO stars Ouji Suzuka as Stephan (voice), Anna Yamada as Chao (voice), Kavka Shishido as Maibei (voice) and Yuuichirou Umehara as Roberta (voice), among others.
How it landed. With an audience score of 8.2/10, ChaO sits among the best-reviewed titles in the catalogue.
Where to watch. In US you can rent or buy it from Amazon Video, Apple TV Store, Google Play Movies and YouTube. See the full, country-by-country breakdown on our where to watch ChaO page.
If you liked it. Fans of ChaO tend to enjoy Spirited Away, Your Name., Grave of the Fireflies and Spider-Man: Into the Spider-Verse.
Frequently asked
- Where can I watch ChaO (2025)?
- In US, ChaO is available to rent or buy from Amazon Video, Apple TV Store and Google Play Movies. Availability varies by country — check our where-to-watch page for every region.
- Is ChaO worth watching?
- ChaO holds an audience score of 8.2 out of 10, and is a strong pick if you enjoy animation, fantasy and romance. Most viewers rate it highly.
- Who stars in ChaO?
- ChaO stars Ouji Suzuka, Anna Yamada, Kavka Shishido, Yuuichirou Umehara and Kenta Miyake.
- When was ChaO released?
- ChaO was released in 2025, with a runtime of about 90 minutes.