TOP > About JAPEX > History
| Dec. | 1955 | As a government-owned company, Japan Petroleum Exploration Co., Ltd. was established to improve national petroleum self-sufficiency | |
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| Mar. | 1958 | Mitsuke oil field (Niigata) was discovered | |
| Jul. | 1958 | Sarukawa oil field (Akita) was discovered | |
| Jun. | 1959 | Higashi-Niigata gas field (Niigata) was discovered |
| Mar. | 1960 | Amarume oil field (Yamagata) was discovered | |
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| Dec. | 1960 | Katakai gas field (Niigata) was discovered | |
| Mar. | 1962 | Kumoide gas field (Niigata) was discovered |
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| Jun. | 1962 | JAPEX SKS Corporation was established | |
| Aug. | 1962 | Shiunji gas field (Niigata) was discovered | |
| Nov. | 1964 | Fujikawa gas field (Niigata) was discovered | |
| May | 1965 | An operation range expanded to overseas by the revision of articles of association | |
| Feb. | 1966 | Established a subsidiary "North Sumatra Offshore Petroleum Exploration Co., Ltd. (NOSOPEX)", the company presently known as INPEX |
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| Oct. | 1967 | At the establishment of governmental "Japan Petroleum Development Corporation (JPDC)", Japex was integrated into JPDC as E&P operating body | |
| Apr. | 1968 | Yoshii gas field (Niigata) was discovered |
| Apr. | 1970 | Reorganized as a private E&P company, Japan Petroleum Exploration Co., Ltd. was separated from JPDC | |
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| May | 1971 | Japex Offshore Ltd. was established | |
| Oct. | 1971 | SK Engineering Co., Ltd.was established |
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| Jun. | 1976 | Yurihara oil and gas field (Akita) was discovered |
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| Dec. | 1978 | Canada Oil Sands Co., Ltd. (CANOS) was established |
| Oct. | 1980 | Japex (U.S.) Corp. was established | |
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| Apr. | 1983 | JGI, Inc. was established |
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| Jun. | 1983 | Iwafuneoki oil and gas field (Niigata) was discovered | |
| Jan. | 1985 | Beijing Representative Office was opened |
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| Mar. | 1989 | Yufutsu oil and gas field (Hokkaido) was discovered | |
| Nov. | 1989 | Ayukawa oil and gas field (Akita) was discovered |
| May | 1990 | London Representative Office was opened |
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| Mar. | 1991 | Jakarta Representative Office was opened |
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| Mar. | 1995 | Japex Pipeline Ltd. was established |
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| Feb. | 1997 | Houston Representative Office was opened |
| Oct. | 2003 | Shirone Gas Co., Ltd. was established | |
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| Dec. | 2003 | JAPEX was listed on the Tokyo Stock Exchange | |
| Mar. | 2005 | Dubai Representative Office was opened | |
| Dec. | 2005 | Japex Libya Ltd. was established | |
| Apr. | 2006 | Japex Block A Ltd. was established | |
| Dec. | 2006 | Japex Buton Ltd. was established | |
| May | 2007 | Japex acquired a 25% equity stake in Energi Mega Pratama Inc. | |
| Nov. | 2009 | Japex purchased a 90% shares of Japex Energy Co., Ltd. | |
| Nov. | 2009 | Japan CBM Limited was established |
| Mar. | 2010 | Japex Garraf Ltd. was established |
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