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Principal Consolidated Subsidiaries and Equity-Method Affiliates

Principal Consolidated Subsidiaries and Equity-Method Affiliates(As of March31,2011)

Consolidated Subsidiaries Principal Business Activities Paid-in Capital or Subscription Amount Unit:millions of yen Percentage of Voting RightsHeld Unit:%
Akita Natural Gas Pipeline Co.Ltd. Pipeline transport of natural gas in Akita Prefecture 250 100.00
SK Engineering Co.,Ltd. Contact engineering and well drilling 300 100.00
JAPEX SKS Corporation Manufacture and sales of petroleum products,real estate management,insurance and travel agent services 90 100.00
North Japan Oil Co.,Ltd. Refining,processing and sales of crude oil 80 100.00
Shirone Gas Co.,Ltd. Manufacting supply and sales of gas in Niigata city,Tsubame City and other adjacent localities 3,000 100.00
Japex Pipeline Ltd. Pipeline management and maintenance 80 100.00
JGI Inc. Contact geophysical surveys and development of geophysical exploration technologies 2,100 100.00
Geophysical Surveying Co.,Ltd. Geophysical surveys and contact mud logging operations 446 100.00
Japex(U.S)Corp. Exploration, development and production of petroleum in the United States, and investment in an LNG project in Malaysia 8,000(Thousands of U.S dollars) 100(100.00)
Japex Libya Ltd. Exploration,development and production of petroleum in Libya 4,450 100.00
Japex Block A Ltd. Exploration,development and production of petroleum on the island of Sumatra in Indonesia 1,415 100.00
Japan Canada Oil Sands Limited Exploration,development and production of oil sands in Canada under a block lease agreement 298,170
(Thousands of Canadian dollars)
100.00
North Japan Security Service Co.,Ltd. Industrial fire fighting and security services 30 89.42
Canada Oil Sands Co.Ltd. Invests in oil sands exploration and development through Japan Canada Oil Sands Limited 1,682
87.98
(1.34)
Japex Offshore Ltd. Exploration,developmentand production of offshore petroleum from continental shelf in the Sea of Japan 5,963 70.61
GEOSYS Inc. Contact geophysical exploration operations and sales of geophysical exploration devices and eqipment 49 54.49
(54.49)
Japex Buton Ltd. Exploration,developmemt and production of petroleum on the island of Buton in Indonesia 815 100.00
Japex Energy Ltd. Purchasing and sales of LNG and petroleum products 90 90.00
Japex Garraf Ltd. Exploration,development and production of petroleum in the Garraf oilfield in Iraq 5,629 71.94
Note:Parenthesis appearing in the voting rights column indicate indirect voting rights which are included in the total
Equity-Method Affiliates Principal Business Activities Paid-in Capital or Subscription Amount
Unit: millions of yen
Percentage of Voting Rights Held
Unit: %
TOHOKU NATURAL GAS Co., Inc. Purchasing and sales of natural gas in the Tohoku region of Japan 300 45.00
JJI S&N B.V. Development and production of offshore petroleum Persian Gulf off Iran 36,883
(Thousands of Euros)
41.67
TELNITE CO.,LTD. Manufacture and sales of drilling mud for well drilling and the provision of mud services 98 47.00
Universe Gas & Oil Company, Inc. Exploration,development and production of petroleum in east coast of Kalimantan,Indonesia 9,443 33.43
Japan Drilling Co., Ltd. Contract offshore well drilling for petroleum 7,572 30.75
Energi Mega Pratama Inc. Exploration, development and production of petroleum in east coast of Java, Indonesia 52,000
(Thousands of U.S dollars)
25.00
Kangean Energy Indonesia Ltd. Exploration, development and production of petroleum in east coast of Java, Indonesia 10
(Thousands of U.S dollars)

[100]
EMP Exploration (Kangean) Ltd. Exploration, development and production of petroleum in east coast of Java, Indonesia 100
(British pounds)

[100]
Diamond Gas Netherlands B.V. Invests in a project operated by Malaysian LNG producer Malaysia LNG Tiga 12,316
(Thousands of Euros)
20(20.00)
Japan CBM Limited. Exploration,development and production of coal bed methane in the eastern region of Kalimantan Island in Indonesia 175 40.12
Notes:  
1.Brackets appearing in the voting rights column indicate the voting rights of iindividuals close to the Company or individuals agreeing with the Company and are excluded from the total.
2.Parenthesis appearing in the voting rights column indicate indirect voting rights which are included in the total.
3.Although shareholdings in Kangean Indonesia Ltd.and EMP Exploration(Kangean)Ltd.amount to less than 20% the Company considers the two to be affiliated companies because the Company essentially holds control of both.