J-REX Corporation Co., Ltd. engages in the planning, development, and sale of mid-to high-rise condominiums in Japan. It also engages in the management and retention of condominiums; administration and management of income properties; and provision of real estate brokerage services. The company also operates Fudosan ITTO, a website for buying and selling single-building condominiums, and income property, as well as provides information on real estate investment; and an asset management app for owners. J-REX Corporation Co., Ltd. was founded in 2002 and is based in Tokyo, Japan.