Ocean System Corporation engages in the supermarket, lunch service, food delivery, and inns and other businesses in Japan. It operates food supermarkets under the Challenger and Gyomu Super names; Japanese-style inn under the Kaifutei Teradomari Nihonkai name; and restaurant under the Yakiniku Kuroshin name, as well as manufactures and sells lunch boxes under brands, such as Fresh Lunch 39. The company also engages in the provision of contract manufacturing of side dishes, etc.; commissioned management of cafeterias within companies, such as offices and factories; home delivery of dinner ingredient sets, etc. under the Yoshikei brand name; and management of sub-FCs in the franchise area. The company was founded in 1963 and is headquartered in Sanjo, Japan.