Yokohama City is celebrating the release of the new Chiikawa movie, “Chiikawa: The Secret of the Mermaid Island,” with a special collaboration event from July 24 to August 2, 2026. Fans can enjoy exclusive activities including free original sticker giveaways, themed photo spots around the city, and a unique fireworks display.
The Chiikawa franchise, created by illustrator Nagano, has grown from social media popularity into a beloved global phenomenon. This collaboration marks a special opportunity for visitors to explore Yokohama while enjoying Chiikawa-themed experiences tied to the movie’s premiere.
About the Yokohama Chiikawa Collaboration Event

To celebrate the movie’s nationwide release on July 24, Yokohama City, along with the Yokohama Tourism Association and Minato Mirai 21, have partnered with Chiikawa to offer a variety of engaging activities. Visitors who order designated menu items or services at participating locations can receive one of four exclusive “stamp-style” original stickers featuring Chiikawa characters against Yokohama cityscapes.


Additionally, multiple photo spots featuring Chiikawa characters such as Chiikawa, Hachiware, Usagi, and Siren will be set up throughout Yokohama, inviting fans to capture memorable moments. The event culminates in a five-minute fireworks show on July 25 at Shinko Pier, highlighting Chiikawa-inspired fireworks in bright yellow and pink colors, sponsored by Matsumoto Kiyoshi and Cocokara Fine.
Highlights
- Free original “stamp-style” Chiikawa stickers at designated Yokohama locations when ordering specific menu items or services.
- Four unique sticker designs featuring Chiikawa, Hachiware, Usagi, and Siren, each linked to different popular Yokohama spots.
- Chiikawa-themed photo spots scattered around Yokohama’s popular areas for fans to enjoy and take pictures.
- Special five-minute fireworks display on July 25, featuring Chiikawa character motifs and brand colors, lighting up Yokohama’s night sky.
- Free participation in a fireworks viewing event with Chiikawa characters at the Hammerhead Park on the same day.
Event Details
| Item | Details |
|---|---|
| Name | “Chiikawa: The Secret of the Mermaid Island” Yokohama Collaboration Event |
| Menu / items | Original “stamp-style” Chiikawa stickers (W60mm × H81mm) |
| Location | Various locations across Yokohama City including BASEGATE Yokohama Kannai, Yokohama Marine Tower, Yokohama Red Brick Warehouse, Yokohama Cosmo World, and more |
| Address | 2-14-1 Shinko, Naka-ku, Yokohama and other locations throughout Yokohama |
| Period | July 24, 2026 – August 2, 2026 |
| Release date | July 24, 2026 |
| Price | Sticker giveaway free with qualifying purchase; fireworks viewing event free (with lottery application) |