Sanei Architecture Planning Co., Ltd. engages in the real estate business. It operates through the following segments: Real Estate Sales, Real Estate Contract, and Leasing. The Real Estate Sales segment handles sales and housing and condominium development. The Real Estate Contract segment deals with customized houses. The Leasing segment manages rentals and administration of business and residential properties. The company was founded by Shinzo Koike on September 29, 1993 and is headquartered Tokyo, Japan.