Japan's Cosmo Petroleum Company, one of the world's top 500 companies, was established in 1986 and is a large-scale enterprise integrating crude oil extraction, transportation, refining, production and sales

COSMO was founded in April 1986 and is ranked third in the Japanese oil industry. Its predecessor was formed by the merger of Daikyo, Maruzen and Asia Oil Company.

Japan Cosmo Petroleum Co., Ltd. is a large-scale enterprise integrating crude oil extraction, transportation, refining, production and sales, in addition to COSMO Petroleum Co., Ltd. has 426 franchise stores (franchise subsidiaries) and 4,003 gas stations throughout Japan. The Company is also engaged in petroleum development, oil transportation, lubricant sales, and petrochemicals.

Japan's Cosmo Oil Corp is a major player in Japan's crude oil industry and the fourth largest oil refiner in Japan.