The Japan Steel Works Ltd. engages in the manufacture and sale of steel products and industrial machineries. It operates through the following business segments: Steel & Energy Products, Industrial Machinery Products, and Others. The Steel & Energy Products segment provides electric and nuclear products, pressure vessels for refining petroleum, clad steel plates and steel pipes, and wind power generation equipment. The Industrial Machinery Products segment deals with the manufacture of resin, converting machinery, and molding machinery. The Others segment covers crystal business and wind power generation equipment. The company was founded on November 1, 1907 and is headquartered in Tokyo, Japan.