Chiikawa the Movie: The Secret of the Mermaid Island
映画ちいかわ 人魚の島のひみつ
“Until whenever.”
Synopsis
Chiikawa and friends set off on a whimsical summer adventure to a mysterious island said to hide a long-lost mermaid secret. What starts as a fun getaway quickly turns into a heartwarming journey filled with surprises, gentle thrills, and adorable chaos. With sparkling seas, strange legends, and unforgettable encounters, the trio learns about courage, friendship, and the magic hidden in small moments.
Trailers, Teasers & Extra Featurettes
Official promotional previews, behind-the-scenes footage, and exclusive clips.
Teaser Trailer (Singapore)Official
Type: Teaser • Published 2026-08-04
Top Cast
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Haruka Aoki
Chiikawa (voice)
Makoto Tanaka
Hachiware (voice)
Ari Ozawa
Usagi (voice)
Yuka Iguchi
Momonga (voice)
Takayuki Asai
Kurimanju (voice)
Yuma Uchida
Rakko (voice)
Miyuri Shimabukuro
Shisa (voice)
Momo Harumi
Furuhonya (voice)
Tsuguo Mogami
Shimajiro (voice)
Minori Suzuki
Siren (voice)
Momoka Terasawa
Hitoha (voice)
Sayumi Suzushiro
Futaba (voice)
Saeko Oki
Mermaid (voice)
Ayaka Nanase
Mermaid (voice)
Nozomi Nagumi
Mermaid (voice)
Chihiro Kawakami
Representative of the Islanders (voice)
Misato Matsuoka
Miso-pickled Islander (voice)
Nina Hanamiya
Miso-pickled Islander (voice)
Financials & Box Office Performance
Production Budget
Undisclosed
Filming & production cost
Worldwide Gross
$110.5M
Total global ticket sales
Key Information & Fast Facts
- Director
- Kei Oikawa
- Screenplay & Story
- Nagano
- Original Score
- Shugo Tokumaru, Chikara Uemizutaru
- Original Title
- 映画ちいかわ 人魚の島のひみつ
- Country of Origin
- Japan
- Spoken Languages
- Japanese
- Runtime
- 1h 39m
- Worldwide Gross
- $110.5M
- Production Studios
- QTORY, CyPic, TOHO
Creative Leadership & Key Crew
Kei Oikawa
Nagano
Shugo Tokumaru, Chikara Uemizutaru
Masaharu Okazaki
Ayumu Takahashi
Yoko Matsuzaki, Taro Imafuku, Naoto Shoji, Masataka Komine, Yoshihiro Furusawa
Department Leadership Roster
Kei Oikawa
Director
Masaharu Okazaki
Director of Photography
Nagano
Screenplay
Shugo Tokumaru
Original Music Composer
Ayumu Takahashi
Editor
Chikara Uemizutaru
Original Music Composer
Taro Imafuku
Producer
Naoto Shoji
Producer
Masataka Komine
Producer
Production Stills & Gallery
Official cinematic photography and background stills for Chiikawa the Movie: The Secret of the Mermaid Island.
Featured In Curated Collections
Editorial lists, community rankings, and cinematic collections featuring Chiikawa the Movie: The Secret of the Mermaid Island.
Letterboxd's Top 250 Animated Films
Letterboxd's official Top 250 Animated Feature Films, ranked by average member rating. Letterboxd 官方 Top 250 最佳动画长片榜单： 根据平台用户的平均评分进行排序。入选影片必须为动画长片，且排除了无法独立观看的剧集衍生剧场版。 *(Updated via Automated ETL Pipeline: 2026-10-18 07:36:20 UTC+8)*
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Curated list of Most Popular on Anime (US). Updated frequently. Last updated August 28, 2026.
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Frequently Asked Questions About Chiikawa the Movie: The Secret of the Mermaid Island
Quick factual answers about cast, synopsis, director, box office, and release information.
What is Chiikawa the Movie: The Secret of the Mermaid Island about?
Chiikawa and friends set off on a whimsical summer adventure to a mysterious island said to hide a long-lost mermaid secret. What starts as a fun getaway quickly turns into a heartwarming journey filled with surprises, gentle thrills, and adorable chaos. With sparkling seas, strange legends, and unforgettable encounters, the trio learns about courage, friendship, and the magic hidden in small moments.
Who directed Chiikawa the Movie: The Secret of the Mermaid Island?
Chiikawa the Movie: The Secret of the Mermaid Island was directed by Kei Oikawa.
Who stars in Chiikawa the Movie: The Secret of the Mermaid Island?
The principal cast of Chiikawa the Movie: The Secret of the Mermaid Island includes Haruka Aoki, Makoto Tanaka, Ari Ozawa, Yuka Iguchi, Takayuki Asai.
When was Chiikawa the Movie: The Secret of the Mermaid Island released and how long is it?
Chiikawa the Movie: The Secret of the Mermaid Island was released in 2026 with a total runtime of 1h 39m.
How much did Chiikawa the Movie: The Secret of the Mermaid Island make at the box office?
Chiikawa the Movie: The Secret of the Mermaid Island grossed $110.5M in worldwide ticket sales.
Who composed the musical score for Chiikawa the Movie: The Secret of the Mermaid Island?
The original motion picture soundtrack for Chiikawa the Movie: The Secret of the Mermaid Island was composed by Shugo Tokumaru, Chikara Uemizutaru.