Sumiken Mitsui Road Co., Ltd. provides civil engineering and construction services. It operates through the following segments: Construction, Manufacture and Sales, and Others. The Construction segment includes civil engineering, building architecture, and road construction. The Manufacture and Sales segment manufactures and sells construction materials such as asphalt, concrete, and hollow blocks. The Others segment covers the real estate business. The company was founded on February 24, 1948 and is headquartered in Tokyo, Japan.