Company Name Business Details Established KUMAGAYA OHKA CO., LTD. Manufacture of chemical agents for chemical industry September, 1983 OHKA SERVICE CO., LTD. Insurance agancy May, 1986 TOK ENGINEERING CO., LTD. Manufacture and sales of automatic chemical supplying machines October, 1992 TOK TECHNO SERVICE CO., LTD. Service, maintenance of process equipment March, 1997 Company Name Business Details Established TOKYO OHKA KOGYO AMERICA, INC. Manufacture and sales of photoresists and high-purity chemical agents used mainly in photolithography processes in the field of semiconductors April, 1989 TOKYO OHKA KOGYO EUROPE B.V. Sales of photoresists and high-purity chemical agents used mainly in photolithography processes in the field of semiconductors, and printing materials December, 2005 TOK TAIWAN CO., LTD. Manufacture and sales of high-purity chemical agents used mainly in photolithography processes in the fields of semiconductors, flat panel displays and package modules, and sales equipment used in the fields January, 1998 TOK KOREA CO., LTD. Sales of products for semiconductors of TOK group September, 2004 CHANG CHUN TOK (CHANGSHU) CO., LTD. Manufacture and sales of high-purity chemical agents used mainly in photolithography processes in the fields of semiconductors and flat panel displays October, 2004

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