The second main visual for the film Chiikawa the Movie: The Secret of Mermaid Island, created by Nagano, has been released.
The movie was released nationwide in Japan on July 24. After 75 days in theaters, it had earned 17.2 billion yen and attracted 11.78 million viewers as of October 6. It currently ranks No. 1 among movies released in Japan in 2026 at the box office.
New Visual:

CAST:
Haruka Aoki as Chiikawa
Makoto Tanaka as Hachiware
Ari Ozawa as Usagi
Tsuguo Mogami as Shimajirou
Minori Suzuki as Siren
STAFF:
Original Story & Screenplay: Nagano
Director: Kei Oikawa
Animation Production: CygamesPictures
Chiikawa the Movie: The Secret of Mermaid Island is an anime film based on Chiikawa’s popular long story, the “Siren Arc.” While attending a camp on an island, Chiikawa and his friends become involved in a plan to defeat the Sirens, who have been kidnapping the island’s residents one by one.
Source: Comic Natalie
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