ONEX Corporation (5987.T) provides metal heat treatment, remediation, and processing services primarily in Japan and internationally, operating through heat treatment and transportation segments that serve sectors including industrial machine tools, automobile parts, and construction machinery. The company offers a comprehensive range of metal heat treatment services, including carburizing, carbonitriding, vacuum heat treatment, high frequency hardening, bright heat treatment, and aluminum alloy heat treatment; quenching and tempering, nitriding, gas nitrocarburizing, shot peening, and PVD coating treatments; as well as specialized heat treatments for oversized parts. It also provides logistics services via subsidiaries such as ONEX Line Corporation and information system development services to support its operations. Founded in 1951 as Ohya Heat Treating Company and formerly known as Oya Netsushori Co., Ltd., ONEX changed its name in July 1991 to unify its group brand identity and is headquartered in Atsugi, Kanagawa Prefecture, Japan, with key plants including Atsugi, Higashi Matsuyama, Yamaguchi, Nagano, and Mie facilities. Recent developments include the establishment of ONEX Tech Center Corporation in May 2014 for advanced technology initiatives; the opening of the Mie Plant and Mie Office in December 2015 to expand capacity; and the ONEX Line Corporation Mie Office opening in March 2016 to enhance logistics reach.