Chiikawa and friends set off on a whimsical summer adventure to a mysterious island said to hide a long-lost mermaid secret. What starts as a fun getaway quickly turns into a heartwarming journey filled with surprises, gentle thrills, and adorable chaos. With sparkling seas, strange legends, and unforgettable encounters, the trio learns about courage, friendship, and the magic hidden in small moments.

Chiikawa the Movie: The Secret of the Mermaid Island (2026)

Until whenever.

★ 7.4/10 July 24, 2026 99 min

AdventureAnimationFamilyFantasy

Director: Kei Oikawa  ·  Writer: Nagano

Chiikawa and friends set off on a whimsical summer adventure to a mysterious island said to hide a long-lost mermaid secret. What starts as a fun getaway quickly turns into a heartwarming journey filled with surprises, gentle thrills, and adorable chaos. With sparkling seas, strange legends, and unforgettable encounters, the trio learns about courage, friendship, and the magic hidden in small moments.

Trailer

Director

Kei Oikawa

Cast

Haruka Aoki Chiikawa (voice) Makoto Tanaka Hachiware (voice) Ari Ozawa Usagi (voice) Yuka Iguchi Momonga (voice) Takayuki Asai Kurimanju (voice) Yuma Uchida Rakko (voice) Miyuri Shimabukuro Shisa (voice) Momo Harumi Furuhonya (voice) Tsuguo Mogami Shimajiro (voice) Minori Suzuki Siren (voice) Momoka Terasawa Hitoha (voice) Sayumi Suzushiro Futaba (voice)