Nippon Koshuha Steel Co., Ltd. engages in the manufacture and sale of high-grade special steels and alloys. It operates through the following segments: Special Steels, Cast Iron, Dies and Tools, and Alloys. The Special Steels segment manufactures and sells high-grade special steel products. The Cast Iron segment manufactures and sells automotive parts and cast products such as construction machinery parts. The Dies and Tools segment manufactures and sells dies and tools, mold parts, and various cutting tools. The alloys segment engages in the sale of wire rods, bars, plates, forgings, processed products and cold-pressed products. It also engages in the development, sale and leasing of information processing and communication systems; as well as sale, leasing and brokerage of real estate The company was founded on May 18, 1950 and is headquartered in Tokyo, Japan.