Penta-Ocean Construction Co., Ltd. engages in the civil engineering and building construction activities in Japan, Southeast Asia, and internationally. The company operates through three segments: Domestic Civil Engineering, Domestic Building Construction, and Overseas. It constructs ports and harbors, airports, power stations, bridges, offices, commercial buildings and lodges, and residential and education buildings, as well as undertakes water supply and sewerage, railway, environmental facility, recreational, and dam and river work projects. The company is also involved in the development of real estate properties; and shipbuilding, leasing, insurance, and environment businesses. Penta-Ocean Construction Co., Ltd. was founded in 1896 and is headquartered in Tokyo, Japan.