Penta-Ocean Construction Co., Ltd. engages in the provision of building, civil engineering, and environmental construction services around coastal areas. The company is headquartered in Bunkyo-Ku, Tokyo-To and currently employs 3,888 full-time employees. The firm operates in four business segments. The Domestic Civil Engineering segment conducts civil engineering works in the domestic markets. The Domestic Construction segment conducts construction works in the domestic markets. The Overseas Construction segment is involved in the provision of construction works in overseas markets. The Others segment engages in the independent development, sales and rental of real estate.