NASU DENKI-TEKKO CO., LTD. engages in the manufacture and sale of steel products for electricity, communications, construction, and road-related businesses. It operates through the following segments: Electric Power and Communications, Construction and Roads, and Insulation and Plastics. The Electric Power and Communications segment manufactures and sells towers, steel structures, iron poles, overhead line fittings, and underground line materials. The Construction and Roads segment deals with steel frames, road facilities and materials, wind power materials, and galvanizing. The Insulation and Plastics segment manufactures and sells insulators and plastic products for electricity. The company was founded on June 1, 1929 and is headquartered in Tokyo, Japan.