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Shin-Etsu Chemical Co., Ltd. is a Japanese multinational chemical company headquartered in Tokyo, Japan. It is the largest chemical company in Japan and one of the largest in the world. The company was founded in 1926 and has since grown to have a global presence with manufacturing facilities in 14 countries. Shin-Etsu Chemical produces a wide range of products, including polyvinyl chloride (PVC), semiconductor silicon, photomask substrates, and rare earth magnets.