Nippon Oil Corporation
|1888||Nippon Oil established.|
|1914||Oil first gushed out of Kurokawa Oil Well No. 5 in Akita Prefecture.|
|1921||Nippon Oil merged with Hoden Oil.|
|1931||Mitsubishi Oil established jointly by three Mitsubishi group companies (headquarters, mining, trading) and Associated Oil (later known as Getty Oil) in the United States.|
|1933||Koa Oil established.|
|1941||Nippon Oil merged with Ogura Oil.|
|1951||Nippon Petroleum Refining established jointly by Nippon Oil and Caltex.|
|1967||Nippon Oil Staging Terminal established.|
|1968||Tohoku Oil established.|
|1973||Okinawa CTS established.|
|1984||All the Getty Oil-owned Mitsubishi Oil shares transferred to Mitsubishi group companies.
Business alliance formed between Nippon Oil and Mitsubishi Oil.
|1995||Business alliance formed between Nippon Oil and Idemitsu Kosan.|
|1996||Nippon Oil terminated business alliance with Caltex and acquired a full stake in Nippon Petroleum Refining.|
|1998||Crude oil production started at Rang Dong Oil Field offshore Vietnam.|
|1999||Nippon Oil and Mitsubishi Oil merged to form Nisseki Mitsubishi.
Business alliance formed between Nisseki Mitsubishi and COSMO Oil.
|2001||New Service Station brand ENEOS launched.|
|2002||Nisseki Mitsubishi Refining, Koa Oil and Tohoku Oil merged into Nippon Petroleum Refining.
Nisseki Mitsubishi renamed Nippon Oil.
|2003||Natural gas production started offshore Malaysia (Helang Gas Field).|
|2004||Consignment refining contract signed with China Oil.|
|2005||Nippon Oil merged with Nippon Petroleum Gas.|
|2006||Business alliance formed with Japan Energy.
Capital tie-up formed with INPEX Holdings.
Nippon Petroleum Refining merged with Nippon Petroleum Processing.
|2007||Business/capital alliance formed with SK Corporation (South Korea). A memorandum of understanding regarding long-term collaboration with China National Petroleum Corporation is concluded.|
|2008||Nippon Petroleum Refining merged with Nippon Petrochemicals.
ENEOS CELLTECH, a joint company with Sanyo Electric Company for stationary fuel cells, established.
Nippon oil conducted a management integration with Kyushu oil.
Conclusion of Memorandum on Management Integration with Nippon Mining Holdings.
|2009||SANYO ENEOS Solar, a joint company with Sanyo Electric Company for the production and sale of thin-film solar panels, established.|