Ocean System Corporation engages in the supermarket, food delivery, lunch service, contract food service, deli food, inn, and restaurant businesses in Japan. The company operates food supermarkets under the Challenger and Gyomu Super brands; home delivery of dinner ingredient sets and other items under the Yoshikei brand; food delivery and mail-order items under the Takuhai brand; and manufactures, sells, and delivers lunch boxes under Fresh Lunch 39 and Gurumeshi brands. It is also involved in the contract manufacturing of prepared foods through employee cafeterias, welfare meals, and school meals under the Komedoron brand; operation of Japanese-style inn under the Kaifutei Teradomari Nihonkai brand; restaurant under the Yakiniku Kuroshin brand; and OM Channel, an e-commerce service for ordering food online. The company was founded in 1963 and is headquartered in Sanjo, Japan.