Out line of TOKYO OHKA KOGYO (TOK) ; Manufacture and sales of manufacturing materials, mainly photoresists and high purity chemicals for photolithography process of semiconductor and display, and inorganic and organic chemicals.
Since its establishment in 1940, Tokyo Ohka Kogyo Co., Ltd. has consistently pursued programs of research and development of superior new technologies and new technical methodologies based on the following management principles: “continue efforts to enhance technology,” “raise the quality levels of products,” “contribute to society” and “promote free-spiritedness.” As we have pursued development of new technologies and new technical methodologies, we have not only paid attention to developing highly functional products with high-performance and developing the cost effective and efficient manufacturing process technologies, but we have also closely examined our products and manufacturing methods with careful consideration to their load on the environment.