Asahi Kasei, Mitsui Chemicals, and Mitsubishi Chemical have explored measures to promote decarbonization and optimize production capacity for their two ethylene manufacturing facilities in western Japan. The three companies have signed a basic agreement to establish a new joint operating entity for the two ethylene production facilities in western Japan, and to subsequently discontinue operations of the Asahi Kasei Mitsubishi Chemical Ethylene Corp. (AMEC) ethylene production facility of its Mizushima Plant in Kurashiki, Okayama Prefecture, and consolidate operations at the Osaka Petrochemical Industries, Ltd. (OPC) facility in Takaishi, Osaka, targeting fiscal 2030. Following verification of equipment performance, operation, and procedural aspects, the three companies aim to commence joint commercial production of the decarbonized basic chemicals in fiscal 2034. The ethylene production facility and related equipment of the Mizushima Plant of AMEC will be dismantled promptly after discontinuation of production. Ethylene production is the upstream starting point of the petrochemical industry.