TOKYO OHKA KOGYO CO., LTD. engages in the manufacture and sale of manufacturing materials, processing equipment, and inorganic and organic chemicals. It operates through the following segments: Materials and Equipment. The Materials segment provides a wide range of photoresists and high purity chemicals, which are widely used in the manufacture of semiconductors, liquid crystal displays, semiconductor packaging, and electronic products. The Equipment segment includes photoresist coating and developing machines used to manufacture LCD (Liquid Crystal Display) panels, as well as a variety of semiconductor manufacturing equipment. The company was founded on October 25, 1940 and is headquartered in Kawasaki, Japan.