Sumitomo Osaka Cement Co., Ltd. engages in the cement business in Japan and internationally. It operates through Cement, Mineral Products, Building Materials, Photoelectrons, New Materials, and Others segments. The company offers cement, cement-based solidification materials, electric power supply, recycling, and ready-mix concrete; limestone, aggregate, calcium carbonate, dolomite, and silica powder; optical communication components and measuring equipment; and ceramic products and nanoparticle materials. It is also involved in repair and reinforcement materials for concrete structures, heavy metal pollution control materials, cathodic protection (ELGARD SYSTEM), and fish reefs and seaweed beds; and real estate leasing, information processing services, and electrical construction work which utilize idle land. The company was incorporated in 1907 and is headquartered in Tokyo, Japan.