Ireisu (Irregular Dice) × Kappa Sushi × Risdom Spring Triple Collaboration Campaign Now Underway
A triple collaboration campaign featuring 2.5D idol group Ireisu (Irregular Dice), rotating sushi chain Kappa Sushi, and English learning rhythm game app Risdom kicked off on March 12, 2026 and runs through April 15 at Kappa Sushi locations nationwide.