Tokuyama Corporation is a Japanese, Tokyo-based chemical company and the world's fourth largest silicon manufacturer. The company was founded as Nihon Soda Kogyo Co., Ltd., a producer of soda ash in 1918 by Katsujiro Iwai. It changed name in 1936 to Tokuyama Soda Co., Ltd. and in 1994 to its present name. It is listed on the Tokyo Stock Exchange and is a component of the Nikkei 225 stock index. The company operates across Japan, Taiwan, China, South Korea, Singapore, Malaysia, Australia, United States, and Germany. Wikipedia