| Date | Main Developments in the Company's Business |
|---|---|
| 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 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 integrated its business with Kyushu Oil Conclusion of Memorandum on Business 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
|
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