Chiikawa’s Long-Awaited First Movie Adaptation! “Movie Chiikawa: Secret of the Mermaid Island” Releasing Summer 2026, Depicting the Siren Arc

The Beloved Chiikawa Manga is Getting Its First-Ever Movie: Eiga Chiikawa Ningyo no Shima no Himitsu Set for Summer 2026!

The beloved manga *Chiikawa* is finally getting its first-ever theatrical film adaptation! Titled *Eiga Chiikawa Ningyo no Shima no Himitsu* (which can be translated as *Chiikawa the Movie: The Secret of the Mermaid Island*), it’s set to premiere in Summer 2026. This cinematic debut will bring to life the renowned “Siren Arc,” a uniquely long and highly popular storyline within the series. Alongside this exciting announcement, a captivating teaser visual has also been unveiled!

Eiga Chiikawa Ningyo no Shima no Himitsu Teaser Visual

The Endearing World of Chiikawa

For those unfamiliar, *Chiikawa* is a hugely popular manga series created by the illustrator Nagano, originally serialized on X (formerly Twitter). Since its debut in 2020, readers have been captivated by the delightful, poignant, and sometimes surprisingly tough daily adventures of its unique and charming characters, including Chiikawa, Hachiware, and Usagi. Its popularity knows no bounds, earning it affection across all generations and a remarkable three “Japan Character Award Grand Prix” accolades. The anime adaptation, which began airing in 2022, has further cemented its global appeal, boasting over 400 million total views on its YouTube catch-up distribution, drawing significant attention not just from Japan but from fans worldwide.

Eiga Chiikawa Ningyo no Shima no Himitsu Logo

Diving into the “Siren Arc”

This inaugural film adaptation, *Eiga Chiikawa Ningyo no Shima no Himitsu*, will delve into the much-loved and distinct “Siren Arc,” a longer narrative within the *Chiikawa* universe. The story kicks off on a seemingly ordinary day as Chiikawa and Hachiware are relaxing in the plaza, only for Usagi to suddenly appear with a flyer stuck to their face! Curious, Hachiware checks the flyer, which turns out to be an invitation to a “special island.” Enticed by promises like “100 times the reward for an easy subjugation on the island” and “exclusive island ramen, limited sweets – everything sweet and spicy is practically free,” Chiikawa and friends decide to embark on an island training camp. But what awaits Chiikawa and the gang, who board the ship alongside the suspicious Rakko-sensei, as they finally set foot on this mysterious island? Get ready for an unforgettable summer to begin!

The Talented Team Behind the Film

Bringing this much-anticipated film to life is director Oikawa Kei, known for his work on series like *Uma Musume Pretty Derby*. The animation production will be handled by CygamesPictures, a studio renowned for its incredible work, including *Gekijouban Uma Musume Pretty Derby Shin Jidai no Tobira*. Expectations are incredibly high for the movie’s unique, high-quality visuals! The original creator, Nagano-sensei, who is also penning the script, shared their excitement for this cinematic venture, commenting, “I’m so happy if you look forward to Chiikawa’s journey on the big screen for the very first time!!”

Nagano-sensei’s Handwritten Comment and Illustration

A Glimpse into the Teaser Visual

The recently unveiled teaser visual offers a charming glimpse into the movie’s atmosphere, depicting Chiikawa, Hachiware, and Usagi riding in a boat. Sporting flower crowns and hula-like skirts – a style we haven’t seen them in before – the trio gazes up at a beautiful full moon against a stunning night sky. It’s truly a fresh look for our adorable companions!

Mark Your Calendars!

The first-ever movie adaptation of the *Chiikawa* manga, *Eiga Chiikawa Ningyo no Shima no Himitsu*, is slated for release in Summer 2026. We can’t wait for more exciting updates to be revealed!

Full Comment from Creator Nagano-sensei

Original Work & Script: Nagano

Chiikawa is getting a movie adaptation!!
The title is Ningyo no Shima no Himitsu (The Secret of the Mermaid Island).

This is the story about going to the island, which I posted on X from March to November 2023.

I would be very happy if you look forward to Chiikawa’s journey on the big screen for the very first time!!

Production Details

© Nagano / 2026 “Eiga Chiikawa” Production Committee

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