Oishi Group Public Co. Ltd. engages in the restaurant, food, and beverage business. It operates through the Food Business and Beverage Business segments. The Food Business segment offers Japanese restaurants, ramen, and snacks. The Beverage Business segment produces and distributes green tea, fruit juice flavored drinks, herbal drinks, and drinking water. The company was founded by Tan Passakornnatee on September 9, 1999 and is headquartered in Bangkok, Thailand.