1966
Established as North Sumatra Offshore Petroleum Exploration Co., Ltd. in conjunction with production sharing contract signed with PERMINA (now PERTAMINA) related to the Offshore North Sumatra Block.
1970
Attaka Field discovered in Offshore Mahakam.
1975
Changed corporate name to Indonesia Petroleum, Ltd.
1994
Production begins in the Griffin Fields. [INPEX Alpha, Ltd.]
2000
- Natural gas and condensate discovered in permit WA 285-P, offshore Western Australia. [INPEX Browse, Ltd.]
- Crude oil discovered in the Kashagan Structure of the Offshore North Caspian Block, Republic of Kazakhstan. [INPEX North Caspian, Ltd.]
- Natural gas and condensate discovered in the Timor Sea Masela Block. [INPEX Masela, Ltd.]
2001
Changed corporate name to INPEX CORPORATION
2002
- Began supplying natural gas to Malaysia via pipeline. [INPEX Natuna, Ltd.]
- Signed Sale and Purchase Agreement between BP Pipelines (BTC) Limited, Turkish Petroleum BTC Ltd., and INPEX CORPORATION for the BTC (Baku-Tbilisi-Ceyhan) pipeline. [INPEX BTC PIPELINE, Ltd.]
- Signed agreement for the sales and purchase of interests in ACG filed (field in production) in the Republic of Azerbaijian with Lukoil. [INPEX Southwest Caspian Sea, Ltd.]
2004
- Joint statement on conclusion of the contract for the integrated appraisal and development operations of Azadegan field among National Iranian Oil Company, INPEX CORPORATION and Naftiran Intertrade Co. Ltd.
- INPEX Announces the Initiation of Condensate Production in the Bayu-Undan Gas Condensate Field of the Timor Sea Joint Petroleum Development Area (JPDA) [INPEX Sahul, Ltd.]
- Acquisition of Japan Oil Development Co., Ltd. (JODCO), which develops and produces crude oil at giant fields offshore Abu Dhabi in the United Arab Emirates.
2005
Central Azeri Production Start in the Caspian Sea, Azerbaijan [INPEX Southwest Caspian Sea, Ltd.]
1941
Teikoku Oil is founded as a semigovernmental company in accordance with the Teikoku Oil Law to unify the existing Japanese oil exploration companies at the time.
1950
Teikoku Oil becomes a private company.
1962
Japan's first long-distance natural gas pipeline between Tokyo and Niigata Prefecture (Tokyo Line, 310 kilometers) is completed.
1975
Commercial production through a subsidiary Teikoku Oil (D.R. Congo) Co., Ltd. begins offshore in the D.R.Congo. This is the company's first overseas oil development project.
1979
The Minami Nagaoka Gas Field with Japan's largest reserve of natural gas is discovered in Niigata Prefecture.
1984
Production at Minami Nagaoka Gas Field begins with completion of Koshijihara Gas Plant.
1992
Teikoku Oil (Venezuela) Co., Ltd. is established. The Company is the first Japanese corporation to participate in the oil development project in Venezuela.
2002
Matsumoto Line and Iruma Line are completed.
2005
- Drilling rights in the East China Sea are granted.
- Teikoku Oil makes successful bids for two oil exploration blocks in the Great Socialist People's Libyan Arab Jamahiriya, at the Bid Round II.
Through this integration INPEX Holdings establishes an operating base with strong international competitiveness to stand on an equal footing with other global oil companies and will realize a more stable supply of oil and natural gas.
2006
- The Australian Government grants Major Project Facilitation (MPF) status to Ichthys Project located in north-west Australia.
- Shizuoka Line and Minamifuji Line are completed in Japan.
- Acquisition of the Area 113-3/4 in the Bid Round 3 for an Exploration and Production Sharing Agreement, the Great Socialist People's Libyan Arab Jamahiriya.
2007
Studies are commenced toward constructing an LNG import terminal in Niigata Prefecture, Japan.
2008
Through merger with INPEX and Teikoku Oil, INPEX Holdings changes its name to INPEX CORPORATION and becomes an operating holding company to ensure a more effective and flexible management structure. Company headquarters move to Akasaka, Tokyo.
