Ichiken Co., Ltd. operates a construction business in Japan, covering architecture, civil engineering, paving, interior finishing, and other general construction works. It also runs a real estate business that includes sales, leasing, and related activities, and is involved in the planning, design, and management of complex commercial facilities and specialty stores. The company was formerly known as Daiichi Kensetsu Corporation Ltd. and changed its name to Ichiken Co., Ltd. in 1989. Incorporated in 1930, it is headquartered in Tokyo, Japan.