OCO Club holds Natsu Matsuri Festival at Tanaka Farms in Irvine in August. 

Everyone, young and old, can enjoy the festivities, which includes various entertainment, a boutique, food, drinks, a mikoshi (portable shrines) parade, and more.

Entertainment is provided by various collegiate taiko groups as well as other entertainers. There is also a craft and boutique area with vendors selling a wide range of unique items.

Food is provided by Tanaka Farms, the OCO BBQ Crew, and other vendors. And there is a beer garden with a variety of drinks.