The Sumitomo business was started in Kyoto, the historic capital city of Japan, in 17th by Masatomo Sumitomo
Sumitomo Electric (Thailand) Limited

Sumitomo Electric Thailand, Ltd (SET) is the subsidiary company of Sumitomo Electric Industries, Ltd. (SEI) in Japan. We were established in 1989 as the sales office for several products from our manufacture in Japan, Taiwan, China, Malaysia, Vietnam, Indonesia, United State of America and United Kingdom. Our main customers are manufactures of major home appliance, automotive parts and telecommunication products.