Its role Owner
Asahi Kasei Mitsubishi Chemical Ethylene Corporation (AMEC) is a Japanese joint venture company established in 2016 to operate a naphtha-fed ethylene cracker at the Mizushima Plant in Kurashiki, Okayama Prefecture. It is owned 50% by Asahi Kasei Chemicals (a subsidiary of Asahi Kasei Corp.) and 50% by Mitsubishi Chemical Corp. The company manufactures and supplies basic petrochemical products, primarily ethylene along with propylene, benzene, toluene, and xylene, to its parent companies for use in downstream chemical production.
Headquartered in Chiyoda-ku, Tokyo, AMEC procures feedstocks such as naphtha and operates the cracker with an annual ethylene capacity of approximately 496,000 tons (with turnaround) or 567,000 tons (without). Its activities focus on the production of olefins and aromatics for the petrochemical industry. The entity has been referenced in industry databases tracking chemical plants and has participated in operational restarts and maintenance activities.
In January 2026, Asahi Kasei, Mitsubishi Chemical, and Mitsui Chemicals announced plans to consolidate ethylene production in western Japan. This includes discontinuing AMEC's Mizushima cracker operations by fiscal 2030 and shifting capacity to a facility operated by Osaka Petrochemical Industries (a Mitsui Chemicals subsidiary) in Takaishi, Osaka. The move supports decarbonization efforts, including potential bio-based production using Asahi Kasei's Revolefin technology, with a new joint operating entity planned. AMEC remains a key player in Japan's petrochemical supply chain amid industry restructuring for competitiveness and sustainability.
Also known as 三菱化学旭化成エチレン株式会社 and 旭化成三菱化学エチレン株式会社.
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