Idemitsu Kosan Co., Ltd. is a Japanese energy company primarily engaged in the refining of crude oil and the production of petroleum products. Established in 1911 by Sazo Idemitsu, the company has grown into one of Japan’s leading refiners, supplying gasoline, diesel, jet fuel and kerosene to both industrial and retail customers. Its core refining operations are supported by a network of domestic refineries that process a wide range of crude oils.
In addition to its downstream refining business, Idemitsu Kosan manufactures petrochemical feedstocks used in the production of plastics, synthetic rubbers and other chemical intermediates. The company also produces a diverse array of lubricants and specialty oils that serve automotive, industrial and marine applications. Through ongoing investments in research and development, Idemitsu seeks to enhance product performance and meet evolving environmental standards.
Over the past decade, Idemitsu has expanded into renewable energy and alternative fuels. Its investments include solar power generation facilities and joint ventures focused on hydrogen production and biodiesel. These initiatives reflect the company’s strategy to diversify its energy portfolio and reduce carbon emissions across its operations.
Idemitsu Kosan serves customers in Japan through an extensive network of retail service stations branded under its name, while its trading divisions handle crude oil sourcing and product exports to markets in Asia, North America and Europe. Headquartered in Tokyo, the company maintains regional offices and logistics facilities that support its global marketing and distribution activities.
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