Ocean System 

Ocean System Corporation is a Japanese enterprise with diverse operations spanning supermarkets, food services, and hospitality. In Japan, it manages food supermarkets under the Challenger and Gyomu Super banners, the Japanese-style inn Kaifutei Teradomari Nihonkai, and the Yakiniku Kuroshin restaurant. The company also manufactures and distributes pre-packaged meals, including those sold under the Fresh Lunch 39 brand. Its services further encompass contract manufacturing of prepared side dishes, outsourced management of corporate dining facilities in workplaces like offices and factories, and home delivery of meal kits, such as dinner ingredient sets, through the Yoshikei brand. Additionally, Ocean System oversees sub-franchise operations within its designated franchise areas. Established in 1963, the company's main office is located in Sanjo, Japan.