| Name | Field Name | Country | Capital | Shareholders | Established |
| CIECO North Sea Ltd. (CNS) | HUDSON HUTTON N.W.HUTTON |
UNITED KINGDOM |
5,085 (million yen) |
ITOCHU 80% Others (1) |
1992.8.11 |
| CIECO Exploration and Production (UK) Limited |
HUDSON HUTTON N.W.HUTTON |
UNITED KINGDOM |
24,526 (thousand pounds) |
CNS 100% | 1992.7.1 |
| ITOCHU Oil Exploration (Azerbaijan) Inc. |
AZERI CHIRAG GUNASHLI |
AZERBAIJAN | 31,010 (thousand US$) |
ITOCHU 100% | 1996.1.22 |
| ITOCHU Oil Exploration (BTC) Inc. |
-- | -- | 63,965 (thousand US$) |
CIECO 55.54% | 2002.6.4 |
| Japan Ohanet Oil and Gas Co., Ltd. |
OHANET | ALGERIA | 6,400 (million yen) |
ITOCHU 35% Others (2) |
2000.3.15 |
| Sakhalin Oil and Gas Development Co., Ltd. |
ODOPTU CHAYVO ARKUTUN/DAGI |
RUSSIA | 22,592 (million yen) |
CIECO 3.66% ITOCHU 14.46% Others (5) |
1995.3.28 |
| CIECO Exploration and Production(Australia) Pty Limited |
BASKER MANTA GUMMY |
AUSTRALIA | 5,280 (thousand A$) |
ITOCHU MINERALS & ENERGY OF AUSTRALIA PTY LTD. 100% |
2004.1.20 |
| CIECO Energy (UK) Limited |
ALBA | UNITED KINGDOM |
10,984 (thousand pounds) |
ITOCHU 100% | 2005.4.4 |
| CIECO Energy (US) Limited |
WEST DELTA 30 14 other fields |
USA | 207 (Million US$) |
ITOCHU 100% | 2007.1.9 |
| CIECO Energy Australia Pty Ltd |
CLIFF HEAD | AUSTRALIA | 1 (A$) |
ITOCHU MINERALS & ENERGY OF AUSTRALIA PTY LTD. 100% |
2007.12.04 |
