Eneos

ENEOS Corporation (ENEOS株式会社, ENEOSU kabushiki gaisha), formerly JXTG Nippon Oil & Energy Corporation (JXTGエネルギー株式会社, JXTG Enerugī Kabushiki-gaisha), or NOC or Shin-Nisseki (新日石) is a Japanese petroleum company. Its businesses include exploration, importation, and refining of crude oil; the manufacture and sale of petroleum products, including fuels and lubricants; and other energy-related activities. It is the largest oil company in Japan, and in recent years it has been expanding its operations in other countries.

Its products are sold under the ENEOS brand, which is also used for service stations. It also previously operated service stations under the Esso and Mobil brands under license from ExxonMobil. In 2019, as a result of JX Holdings' merger with TonenGeneral Group in 2017 to form JXTG Holdings, both brands were phased out in favour of ENEOS EneJet.

The company was established 1888 as the "Nippon Oil" (日本石油, Nihon Sekiyu), or "Nisseki" (日石) for short. In 1999, the company merged with and absorbed the former "Mitsubishi Oil" (三菱石油, Mitsubishi Sekiyu). The merged company was called "Nippon Mitsubishi Oil" (日石三菱, Nisseki Mitsubishi) until 2002, when it was renamed back to Nippon Oil Corporation. In 2010, NOC merged with Nippon Mining to form JX Holdings, and Nippon Oil was renamed JX Nippon Oil & Energy. In 2017, JX and TonenGeneral were merged into JXTG Holdings. The company's name was slightly modified to JXTG Nippon Oil & Energy. In June 2020, ENEOS Corporation was adopted as the current name.

The company has worldwide locations including ENEOS USA Inc. in Schaumburg, Illinois, Torrance, California, and Nippon Oil Lubricants (America), LLC, in Childersburg, Alabama. They have brought their premium brand motor oil ENEOS and SUSTINA into the United States recently. The product line includes the extremely difficult to formulate 0W-50 viscosity oil. New line of premium full synthetic motor oil SUSTINA is now available in the United States.

ENEOS employs over 5,500 people, with additional employees from oversea divisions, and operates the following refineries throughout Japan:

Nippon Oil Exploration owns a 5% share of Syncrude, a Canadian oil sands mining company, through its fully owned subsidiary Mocal Energy.

The company also has technical collaboration with Tide Water Oil Co., an Indian petroleum products manufacturer. Superior quality lubricants under the brand name ENEOS are manufactured and marketed in India by Tide Water Oil Co.

On 11 March 2011, a 145,000-barrel-per-day refinery in Sendai was set ablaze by the Tōhoku earthquake. Workers were evacuated, but tsunami warnings hindered efforts to extinguish the fire until 14 March, when officials planned to do so.