1940
1941
Teikoku Oil Co., Ltd. is founded as a semi-government company to unify the existing Japanese oil exploration companies at the time.
1950
1950
Becomes a private company.
1960
1960
Begins water-soluble gas development at the Minami Kanto Gas Field (Naruto Gas Field).
1962
Completes Japan's first long-distance natural gas pipeline between Tokyo and Niigata Prefecture (Tokyo Line).
1966
North Sumatra Offshore Petroleum Exploration Co., Ltd. (precursor to INPEX CORPORATION) is founded as a company promoting the independent development of overseas oil resources in accordance with a contract signed with PERMINA (now PERTAMINA).
1970
1970
Discovers the Attaka Field in the Offshore Mahakam Block in Indonesia.
1973
Japan Oil Development Co., Ltd. (JODCO) is founded.
Acquires interests in the ADMA Block located offshore Abu Dhabi in the UAE.
1977
Changes its corporate name to Indonesia Petroleum, Ltd.(Its Japanese corporate name is changed in 1975).
1979
Discovers the Minami Nagaoka Gas Field containing Japan's largest natural gas reserves in Niigata Prefecture.
1980
1984
Begins production at the Minami Nagaoka Gas Field following completion of the Koshijihara Gas Plant.
1990
1994
Completes the Oyazawa Gas Plant.
1998
Acquires interests in the Offshore North Caspian Block in Kazakhstan; Permit WA 285-P offshore Australia; and the Masela Block offshore Indonesia.
2000
2000
Discovers the Kashagan Oil Field in Kazakhstan and the Ichthys and Abadi gas fields in the Timor Sea.
2001
Changes its corporate name to INPEX CORPORATION.
2004
Acquires Japan Oil Development Co., Ltd. (JODCO).
Listed on the First Section of the Tokyo Stock Exchange.
2005
Production starts at the ACG Oil Fields in Azerbaijan.
2006
INPEX and Teikoku Oil integrate their management and establish a joint holding company, INPEX Holdings, Inc.
2008
INPEX CORPORATION is founded.
INPEX CORPORATION is founded through a merger of INPEX, Teikoku Oil and INPEX Holdings.
The company headquarters are moved to Akasaka, Tokyo.
2012
Reaches a Final Investment Decision (FID) on the Ichthys LNG Project in Australia.
2013
Starts up the Naoetsu LNG Terminal in Japan.
2014
The concession agreement for the Upper Zakum Oil Field offshsore Abu Dhabi is extended.
2015
Acquires a participating interest in the ADCO Onshore Concession (now the Abu Dhabi Onshore Concession) in Abu Dhabi.
Joins the Sarulla Geothermal Independent Power Producer Project in Indonesia.
2016
Starts full-scale operations of the Toyama Line in Japan.
The dispatch of crude oil from the Kashagan Oil Field in Kazakhstan starts.
2017
The concession agreement for the ACG Oil Fields in Azerbaijan is extended.
2018
Acquires an interest in the Lower Zakum concession offshore Abu Dhabi.
The concession agreement for the Satah and Umm Al-Dalkh Oil Fields offshore Abu Dhabi is extended.
Begins production at the Ichthys LNG Project in Australia.
Production starts at the Prelude FLNG Project.
2019
Receives approval of the revised plan of development for the Abadi LNG Project in Indonesia.
2021
Announces "Business Development Strategy - Towards a Net Zero Carbon Society by 2050."
Changes its Japanese corporate name to Kabushiki Kaisha INPEX.
Joins the Snorre Project in the Norwegian North Sea.
Joins the Muara Laboh Geothermal Power Project in Indonesia.
2022
Announces the formulation of the “Long-term Strategy and Medium-term Management Plan (INPEX Vision @2022).”
Joins the Luchterduinen and Borssele III/IV offshore wind power projects in the Netherlands.
2023
Joins the Moray East offshore wind power project in the UK.
2025
Announces the formulation of the “INPEX Vision 2035.”