Hokkaido Sumiden Steel Wire Co., Ltd.

Hokkaido Sumiden Steel Wire Co., Ltd. (NSW), established in 2005, is a premier manufacturing hub for oil-tempered valve spring wire within the Sumitomo Electric Group. Located at the Nippon Steel Corporation Muroran Works, the company utilizes advanced metallurgical technology to produce high-performance components for the global automotive and industrial sectors. Their product range is essential for engine valve springs, providing superior stability and quality that supports critical industrial infrastructure. NSW emphasizes continuous research and development to deliver innovative material solutions from its Hokkaido base. The company operates as a strategic manufacturing partner, integrating precision engineering with high-volume production capabilities.