Also known as:
Idemitsu is a major refining company with operations primarily in Japan.
Idemitsu owns and operates three refineries in Japan and has an ownership interest in three additional refineries through its participation in Showa Shell, since buying out most of Shell's interest in 2016. All six refineries are due to be integrated under full Idemitsu ownership and operating control in April 2019.
Headquarters: 1-1 Marunouchi 3-chome, Chiyoda-ku, Tokyo 100-8321, Japan
1957 - Tokuyama plant commissioned
1963 - Chiba plant commissioned
1975 - Aichi refinery opened
2003 - Hyogo refinery closed
2014 - Tokuyama refinery closed
2016 - Acquisition of most of Shell's interest in Showa Shell
2019 - Full integration of Showa Shell assets into Idemitsu
2024 - Decommissioned Yamaguchi refinery in March 2024