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