Chiikawa the Movie: Secret of Mermaid Island

Aired: 2026

A theatrical film produced by CygamesPictures. Based on the manga by Nagano serialized on Kodansha (originating from X, formerly Twitter), with over 4.6 million copies in cumulative circulation (as of November 2025). Scheduled for release on July 24, 2026. The first-ever film adaptation of the hugely popular character "Chiikawa," bringing the beloved "Siren Arc" from the original manga to the big screen. Chiikawa, Hachiware, and Usagi are lured by an invitation flyer to a special island, where they face the mysteries that await them. Original story and screenplay by Nagano. Distributed by Toho. ©ナガノ/講談社・ちいかわ映画製作委員会