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According to Sinochem News, recently Asahi Kasei, Mitsui Chemicals, and Mitsubishi Chemical reached a final agreement on the shareholding ratios within the joint venture that will operate the ethylene production facilities in western Japan. It has been decided to use the amount of olefin purchased as the basis for calculation, with the equity distribution in the joint venture being 45% for Mitsui Chemicals, 45% for Mitsubishi Chemicals, and 10% for Asahi Kasei; discussions on the detailed integration rules will be carried out on this basis going forward. Ethylene plants represent the core upstream component of the petrochemical industry; the basic chemical materials produced there are widely used in areas such as daily necessities, automobiles, and semiconductors, serving as an important foundation for the development of both civilian life and industry. Under the trends of lower carbon emissions in the industry and more intensive use of production capacity, it has become an inevitable choice for enterprises to work together to reduce carbon emissions, enhance their core competitiveness, and establish sustainable business models. As early as January 2026, the three companies signed a basic cooperation agreement, planning to shut down the facilities at the Mizushima plant of Asahi Mitsubishi Chemical Ethylene Company by 2030 and integrate all production capacity into the Osaka Petrochemical Industrial Complex owned by Mitsui Chemicals. Subsequently, the three parties will finalize the terms of the joint venture agreement and establish the shareholding structure and operational details.