TOKYO OHKA KOGYO CO., LTD. (TOK) provides chemical products, such as photoresist, and equipment for semiconductors and liquid crystal displays.

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Subsidiaries

Corporate Information

Introduction of subsidiaries in Japan and overseas.

Subsidiaries in Japan

Company NameBusiness DetailsEstablished
KUMAGAYA OHKA CO., LTD.Manufacture of chemical agents for chemical industrySeptember, 1983
OHKA SERVICE CO., LTD.Insurance agancyMay, 1986
TOK ENGINEERING CO., LTD.Manufacture and sales of automatic chemical supplying machinesOctober, 1992

Worldwide Subsidiaries

Company NameBusiness DetailsEstablished
TOKYO OHKA KOGYO AMERICA, INC.Manufacture and sales of photoresists and high-purity chemical agents used mainly in photolithography processes in the field of semiconductorsApril, 1989
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 fielJanuary, 1998
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 displaysOctober, 2004
TOK ADVANCED MATERIALS CO., LTD.Developments, Manufactures, and sales of photoresists for semiconductors and photoresist-related high-purity chemicalsAugust, 2012
TOK CHINA CO., LTD.Sales of photoresists for semiconductor and LCD, and photoresist-related high-purity chemicals in CHINAJanuary, 2021