J-REX Corporation Co., Ltd. engages in the planning, development, and sale of mid to high-rise condominiums in Japan. The company manages and retains condominiums, administers and manages income properties, and provides real estate brokerage services. It operates Fudosan ITTO, a website for buying and selling single-building condominiums; Income Property ONLINE, a website for real estate information; and an asset management app for owners. In addition, the company offers after-sales care and condominium management, and space utilization services, such as Prime Cube storage room, Riders Garages for car storage, staffless box, coin parking, convenience store, and event space. The company was incorporated in 2002 and is based in Tokyo, Japan.