Tekken Corp. engages in the civil engineering and construction works, and real estate businesses. It operates through the following business segments: Civil Engineering, Construction Works, Real Estate Business, Incidental Business, and Others. The Civil Engineering segment handles contracted civil engineering works including the planning, surveying, design, supervision, management and consulting. The Construction Works segment covers contracted construction works from surveys to planning, design, management, and supervision. The Real Estate Business segment deals with real estate buy and sell and real estate leasing. The Incidental Business segment handles the sales of equipment related to civil engineering and construction work. It also offers security services. The Others segment includes the operation of sports facilities. The company was founded on February 1, 1944 and is headquartered in Tokyo, Japan.