Cosmo Oil Company, Limited (コスモ石油株式会社, Kosumo Sekiyu kabushiki gaisha) is a Japanese petrochemical company. It is Japan's third-biggest refiner by sales after JX Holdings and Idemitsu Kosan. Cosmo traces its corporate roots to Maruzen Petroleum (丸善石油株式会社), a company established in 1931, although the oil business operated by Maruzen was originally established by Zenzo Matsumura in Kobe in 1907. Cosmo Oil Company was formed on April 1, 1986, through the merger of Maruzen Petroleum and Daikyo Petroleum, a group of oil businesses based in Niigata Prefecture, which merged in 1939. More information...
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