OS Co., Ltd. engages in development of services businesses such as movie theaters, real estate leasing, condominium sales, and restaurants. It operates through the following business segments: Movie, Real Estate Rental and Sales, Restaurant, and Others. The Movie segment handles the operation of movie shows and theaters. The Real Estate Rental and Sales segment deals with real estate rental, building sales and brokerage, and facility management. The Restaurant segment manages a chain of restaurants. The Others segment includes the operation of amusement stores such as Namco Sannomiya. The company was founded by Ichizo Kobayashi on December 16, 1946 and is headquartered in Osaka, Japan.