is a Japanese convenience store franchise chain first opened in Japan on September 1, 1981. FamilyMart is Japan's third largest convenience store chain, behind 7-Eleven and Lawson, and used to be the largest chain store in South Korea (now renamed to CU). FamilyMart is owned and overseen by FamilyMart Company, Limited. The main shareholder is Itochu with a stake of 35.55% Its headquarters is on the 17th floor of the Sunshine60 Building in Ikebukuro, Toshima, Tokyo.