IHI Corp. engages in the design, manufacture, sale, installation, repair, overhaul, and maintenance of heavy machinery. It operates through the following segments: Resources, Energy and Environment; Social Infrastructure and Offshore Facilities; Industrial System and General-Purpose Machinery; Aero Engine, Space and Defense; and Others. The Resources, Energy and Environment segment includes boilers, power systems, motors for land and marine use, gas processes for storage facilities and chemical plants, nuclear power, gas engines, environmental systems, and pharmaceutical plants. The Social Infrastructure and Offshore Facility segment deals with bridges, water gates, steel structures, shield tunneling machines, transportation systems, urban development, and security. The Industrial System and General-Purpose Machinery segment offers rotating machinery, logistics systems, materials handling equipment, parking systems, steel manufacturing equipment, industrial machinery, heat and surface treatment, papermaking machinery, vehicular turbochargers and compressors, construction machinery, and agricultural equipment. The Aero Engine, Space and Defense segment handles aircraft engines, rocket systems, space exploration, and defense systems. The Others segment includes inspection and measurement business as well as the manufacture and sale of related equipment. The company was founded on December 5, 1853 and is headquartered in Tokyo, Japan.