Chemipro Kasei Kaisha, Ltd. Chemipro Kasei Kaisha, Ltd. (4960.T) manufactures and sells specialty organic chemicals and household products primarily in Japan and internationally. The company produces ultraviolet absorbers, notably as the world's leading manufacturer of benzotriazole UV absorbers; antioxidants; light stabilizers; color developers for thermal and carbonless papers; intermediates for dyestuffs, pharmaceuticals, agricultural chemicals, and photographic chemicals; organic electronic materials including OLED materials; plastic additives; papermaking chemicals; corrosion inhibitors; and wood preservatives, fungicides, and insecticides for the home industry segment. It also engages in contract and toll manufacturing services for small-lot kilogram-scale to tonne-scale production of pharmaceutical, agricultural, and electronic intermediates, leveraging precision synthesis technology, and operates plants in Aioi, Akashi, Himeji, and Fukushima, Japan. Founded in September 1982 and headquartered at Sannomiya Century Bldg. 14F, 83 Kyomachi, Chuo-ku, Kobe, Hyogo, the company serves industries such as plastics, automotive, textiles, electronics, and housing materials with a workforce of approximately 230 employees. Recent developments include maintenance of its Standard Market listing on the Tokyo Stock Exchange following the 2022 market restructuring, alongside an unknown investor acquiring an additional 10.52% stake in 2025, and ongoing emphasis on environmental initiatives like byproduct recycling, energy-saving cogeneration, and low-carbon production technologies at its facilities.