Happy Sumo at Riverwoods is a dining facility that accepts on-call reservations for luncheons and dinners. The facility is managed by Happy Sumo Sushi, which is an eating establishment that offers gift cards of several denominations. The parent organization serves a variety of sushi items, rolls, appetizers and entrees. Happy Sumo Sushi manages a VIP area and birthday club. The parent organization also serves calamari, wraps, seared tunas, dragon scales, crispy crab wontons, vegetable pot stickers and crab cakes. Its menu includes a range of desserts that includes cheesecake, banana split, sorbets and mochi balls. Happy Sumo Sushi serves noodles, steaks, and chicken and beef items.