Otani Kogyo Co., Ltd. engages in the design, manufacture, and sale of metal wires, steel towers, steel structures, and studs. It operates through the Power Communication and Building Materials segments. The Power Communication segment offers overhead line hardware, steel towers, and steel structures. The Building Materials segment covers the manufacture and sale of studs used as construction material. The company was founded on February 1, 1946 and is headquartered in Tokyo, Japan.