Japan’s most adorable — and occasionally most emotionally devastating — anime franchise is heading to cinemas for the very first time. 映画ちいかわ 人魚の島のひみつ (Chiikawa Movie: The Secret of Mermaid Island) opens in Japanese theatres on 24 July 2026, with a simultaneous IMAX release making it the biggest moment in Chiikawa history.
The Siren Arc Finally Gets Its Big-Screen Debut
If you follow the Chiikawa manga on X, you know exactly what the Siren Arc is — and why it left so many fans wrecked. Originally posted between March and November 2023, the セイレーン (Siren) storyline is the longest and darkest narrative the series has ever told: a slow-burn island adventure that starts warmly and turns genuinely tense, with Chiikawa, Hachiware, and Usagi facing something far more threatening than the usual monsters they subdue on commission. It trended repeatedly on Japanese social media and drew a huge international following during its original run.
The film adapts this arc faithfully, with the script written by Nagano — the original creator — herself. New voice talent joining the cast for the film includes Suzuki Minori as the Siren, a significant addition for a character who sits at the emotional heart of the story.
CygamesPictures and Uma Musume’s Director at the Helm
Animation is handled by CygamesPictures, the studio that produced Uma Musume: Pretty Derby – Beginning of a New Era, with Kei Oikawa directing. The film score is composed by Tokumaru Shugo and Kamishidataru Chikara. The opening theme 「くつずれ」 (Kutsu-zure) is written by Nagano and performed by Hachiware’s voice actor Tanaka Seijin, backed by the Suginami Children’s Choir.
The full main cast returns: Aoki Haruka as Chiikawa, Ozawa Ari as Usagi, and Tanaka Seijin as Hachiware. Fans who have been waiting for Usagi’s full rapper persona to finally get a proper showcase will not be disappointed — the character’s rap debut in the film is confirmed as a centrepiece moment, and it gets the full IMAX audio treatment.
IMAX — Because Small Things Deserve a Big Screen
The simultaneous IMAX release was confirmed on 9 July, and the IMAX-exclusive triptych poster — showing Hachiware, Chiikawa, and Usagi in extreme close-up with “MAX” plastered across each panel — immediately became a fan favourite. In IMAX, the film’s visuals stretch floor-to-ceiling and wall-to-wall, and the high-precision audio system means Usagi’s rap will be felt as much as heard.
Early viewers at participating Japanese cinemas also receive one of eight character charm mini-figures, distributed randomly at the door.
When Can Singapore Fans Watch It?
Japan gets the film first on 24 July. Across Asia, Hong Kong and Macau have confirmed a 6 August theatrical release — both in Japanese with Chinese subtitles and a Cantonese dub — making it the closest option for Singapore fans who happen to be travelling in August. The Philippines has also confirmed a theatrical run via Medialink Films.
For Singapore itself, Medialink Films Singapore is the regional distributor for Southeast Asia and has been signalling interest in the local release — but no Singapore date is confirmed yet. Follow @medialinkfilmssg on Instagram for any announcement. Given that Chiikawa merch practically vanishes the moment it hits Japanese lifestyle stores in Singapore, local demand is not going to be the obstacle. Keep an eye on our manga and anime coverage and we’ll report as soon as a date lands.