Nagano’s Chiikawa is being adapted into an anime film, scheduled for release in summer 2026. The movie, titled « Chiikawa: Ningyo no Shima no Himitsu« , will cover the manga arc commonly known as the « Siren Arc »/ « Island Arc ». To celebrate the announcement, Nagano has revealed vibrant new artwork.
Teaser Visual:
Special Illustration by Nagano:
CAST:
Haruka Aoki as Chiikawa
Makoto Tanaka as Hachiware
Ari Ozawa as Usagi
STAFF:
Original Story & Screenplay: Nagano
Director: Kei Oikawa
Animation Production: CygamesPictures
The « Siren Arc » of the manga follows Chiikawa and friends as they travel to an island that promises generous rewards and “basically free” food in exchange for a few simple tasks.
Source: Comic Natalie
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