The Oregon Plant of TOKYO OHKA KOGYO AMERICA, INC., located in Hillsboro, Oregon, produces i-line semiconductor photoresists and high-purity chemical agents used mainly in photolithography processes in the field of semiconductors.
This plant plays an extremely important part, serving as the supply hub of semiconductor photoresists and high-purity chemical agents for the costomers in United States and Europe.

TOKCCAZ, LCC. performs sales of photoresists for semiconductors and photoresist-related high-purity chemicals in United States.

TOK TAIWAN CO., LTD. is engaged in the manufacture and sales of photoresists used to manufacture semiconductors, and high purity chemicals used in photolithography processes in the fields of semiconductors, flat panel displays and package modules, and sales of equipment used to manufacture semiconductors and flat panel displays.

TOK Advanced Materials Co., Ltd. develops, Manufactures, and sells photoresists for semiconductors and sells photoresist-related high-purity chemicals.

TOK CHINA CO., LTD. performs sales of photoresists for semiconductors and flat panel displays and photoresist-related high-purity chemicals in CHINA.

It is the mission of the Singapore Office to obtain a firm grasp of the wants and needs of users, provide them with detailed information matching those wants and needs in the fields of semiconductors and liquid crystal displays in the areas of Singapore and Malaysia.

Europe Branch (Hoofddorp, The Netherlands) does some effective marketing and provides sales support of semiconductor photoresists and high-purity chemical agents used mainly in photolithography processes in the field of semiconductors.