Shin-Etsu Chemical Co., Ltd. is the largest chemical company in Japan. Shin-Etsu has the largest global market share for polyvinyl chloride, semiconductor silicon, and photomask substrates. “Shin-Etsu” in the company's name derives from Shin'etsu Region, where the company established the first chemical plant as Shin-Etsu Nitrogen Fertilizer in 1926, though the company today is headquartered in Tokyo and has its manufacturing locations in 16 countries worldwide. Shin-Etsu is listed on the Tokyo Stock Exchange, where it is a component of the Nikkei 225 and TOPIX Core 30 indices. Wikipedia