#Japan #Tokyo #Kappa Sushi #Ireisu #Risdom

A Celebration of Spring with Ireisu, Kappa Sushi, and Risdom

On March 12, 2026, a new and exciting collaboration began, bringing together the 2.5D idol group Ireisu, Kappa Sushi, and the innovative language-learning app Risdom. This engaging campaign, named "Eat, Learn, and Support! A Spring Adventure with Ireisu at Kappa Sushi!", promises to deliver a unique experience that blends delicious food, fun learning, and the thrill of supporting your favorite idols. This campaign will run from today until April 15, 2026, at Kappa Sushi locations across Japan, with the exception of select stores undergoing renovations.

Special Menu Selection by Ireisu Members

To make this collaboration even more special, Ireisu members carefully curated a menu featuring their favorite sushi. The Adult Set includes selections chosen by adult members Naiko, If, and Yusuke, highlighting tasty items like fatty tuna, salmon, and more. Additionally, a spring-flavored "Spring Color Chawanmushi" is included. For younger fans, a Kids Set focuses on popular dishes and features vibrant "Spring Color Pancakes", inspired by the group's member colors. Both sets come packaged with original A5 notebooks and stickers featuring unique designs, along with special seating arrangements that make dining at Kappa Sushi feel like a true Ireisu experience.

The refreshing atmosphere of spring will infuse every meal shared at Kappa Sushi during this exclusive event, but patrons are reminded that the availability of items may vary due to weather or popularity.

Unique Atmosphere with Exclusive Music

In-store, guests can enjoy specially recorded announcements featuring members of Ireisu, broadcasted every hour, creating an immersive dining experience. Moreover, the "Ireisu Arrange Version" of the Kappa Sushi theme song will also be played in the stores, turning a simple dinner into a lively concert-like environment. To further enhance this experience, specially animated music videos accompanying this exclusive track can be viewed on ordering touch panels within the store (audio not included).

A unique experience awaits in the 20 special collaboration locations, which feature large photo panels and table stickers adorned with original illustrations, allowing fans to immerse themselves in the world of Ireisu while enjoying their meals. Locations participating include Tokyo, Kanagawa, Saitama, Chiba, Nara, Miyagi, Iwate, Osaka, Aichi, Hiroshima, and Fukuoka. Full details can be found on the campaign’s dedicated website.

Risdom App Collaboration Launch

In conjunction with the restaurant campaign, a limited-time event within the Risdom app also launched today. The app has been designed to reflect the collaboration and features Ireisu members in special outfits. Users can enjoy rhythm games using exclusive songs and visuals directly related to the group. Plus, Risdom characters Alice and Ridel make appearances dressed in Kappa Sushi uniforms alongside Kaa-kun and Paa-chan, adding another layer of entertainment.

As a bonus, customers who order from the collaboration menu will receive special in-app items, making this an extraordinary interactive experience connecting dining with learning.

Conclusion

This wonderful collaboration brings fans together through their love for sushi and support for Ireisu, creating cherished spring memories. The vibrant teamwork of Ireisu, Kappa Sushi, and Risdom stands as a testament to innovative experiences that blend different forms of enjoyment, education, and community devotion. Join the fun at any Kappa Sushi location or through the Risdom app as Ireisu invites you to experience a memorable spring!

Campaign Details

• - Period: March 12, 2026 - April 15, 2026
• - Locations: Available at all Kappa Sushi restaurants (with some exceptions)
• - Website: Campaign Official Website
• - Note: Menu items are limited and may vary by store based on availability, so check the official site for more information.

Who is Ireisu?

Ireisu (Irregular Dice) is an up-and-coming 2.5D idol group affiliated with VOISING, formed in October 2020. They primarily engage with fans through singing, original songs, and live streams, rapidly becoming a celebrated name in the entertainment industry. After successfully completing a nationwide tour in 2023, their promised performance at the Budokan in February 2024, and their first-ever dome performance planned for late 2024, Ireisu continues to captivate audiences across Japan with their dynamic offerings.

For more information on Ireisu, please visit their official site at Ireisu Official Website.