IHI Corp. engages in the design, manufacture, sale, installation, repair, overhaul, and maintenance of heavy machinery. The company is headquartered in Koto-Ku, Tokyo-To and currently employs 28,237 full-time employees. The firm operates in four business segments. Resource & Energy & Environment segment manufactures, sells and provides services for boilers, prime movers, storage facilities, chemical plants, nuclear equipment, environmentally responsive systems and pharmaceutical plants. Social Infrastructure and Offshore segment provides bridges, sluices, shield systems, transportation systems, concrete building materials. Industrial System & General-Purpose Machinery segment provides logistics systems, industrial machinery, transport machinery, as well as papermaking machinery. Aerospace & Space & Defense segment provides space development related equipment and defense equipment systems. The firm also manufactures, sells, and provides services for communication, electronic, electrical measurement and information processing equipment and devices.