Tosoh Corporation (東ソー株式会社, Tōsō Kabushiki-gaisha) (TYO: 4042) is a diversified global chemical and specialty materials company. Headquartered in Tokyo, Japan, and listed on the Nikkei 225 index, the Company has expanded its reach into high value-added businesses such as fine chemicals, scientific instrumentation, thin film materials, and quartzware. The Tosoh Group comprises more than 130 companies worldwide and collectively employs a multiethnic workforce of over 9,000 people and generates net sales of ¥649 billion (US$5.5 billion).