Cosmo Energy Holdings, established in 2015, manages the Cosmo Energy Group's businesses from oil exploration and production through refining and sales. Cosmo Oil runs refineries in Chiba, Yokkaichi and Sakai, and Cosmo Oil Marketing works with service-station operators. The group also makes petrochemical products together with group companies.
Its renewable energy business is led by Cosmo Eco Power, a wind power company founded in 1997 that develops, builds, operates and maintains wind farms; it began commercial operation at the Shin-Iwaya Wind Park in March 2025. The group also offers corporate power purchase agreements and is working on domestic sustainable aviation fuel and hydrogen stations.
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