Nichia Steel Works, Ltd. manufactures and sells wire products and related fasteners in Japan. The company produces ordinary wire products such as zinc-plated iron wires, colored galvanized iron wires, alloy-plated iron wires, rock fall prevention nets and gabions; special wire products including hard steel wires, plated steel wires, steel flat wires, steel stranded wires, wire ropes, and colored steel wires for the automotive, electric power, communications and public works sectors; bolt and screw products comprising torsia-type high-strength bolts, hexagonal high-strength bolts and galvanized nithia (GN) bolts for civil engineering and construction; and tertiary processed products like animal damage prevention fences and barbed wire. Nichia Steel Works operates through these product segments alongside real estate leasing of buildings and land, with production facilities in eastern and western Japan enabling short delivery times; it maintains headquarters in Amagasaki-shi, Hyogo Prefecture, and was founded in 1952. In July 2025, the company divested its 40% equity stake in TSN Wires Co. Ltd., a joint venture with SIW focused on premium steel wire segments, to SIW for nominal consideration, streamlining its international partnerships.