The beloved characters of Chiikawa will star in their first feature film, "Chiikawa Movie: Ningyo no Shima no Himitsu," slated for release in Summer 2026. The movie will adapt the popular "Siren Arc" from the original manga. Produced by CygamesPictures, known for their work on Granblue Fantasy The Animation and Princess Connect! Re: Dive, this film promises to bring the unique, often surreal, slice-of-life world of Chiikawa to a larger format. The series, created by Nagano, centers on the daily adventures and struggles of small, cute creatures navigating a world filled with both simple joys and unexpected challenges. Fans can expect the film to lean into the series' signature blend of adorable animal characters, surreal comedy, and whimsical slice-of-life elements, now with the added mystery of mermaids. The adaptation of the Siren Arc suggests a narrative arc that explores deeper, perhaps more emotional, themes within the Chiikawa universe.