Sumitomo Electric Industries, Ltd. is a Japanese multinational conglomerate company headquartered in Ch??-ku, Osaka, Japan. It specializes in the manufacturing of electric wire and optical fiber cables. The company was founded in 1897 by the Sumitomo family, and was incorporated as a public company in 1899. The company is one of the constituent companies of the Nikkei 225 stock market index. In addition to electric wire and cable, Sumitomo Electric manufactures a variety of products including electronic devices, automotive parts, and industrial machinery.