Abu Dhabi Oil Co., Ltd. Maruzen Oil Co., Ltd.
$ {' d: P; P- o- }% S9 Z0 ]# F Castrol Mitsui Oil And Gas Co., Ltd.3 Q7 P" |' t+ l
Corning Mobilsekiyu Kabushiki Kaisha
' H& T& q; ^. c; U; E) b Cosmo Oil Co., Ltd. Nichigo Engineering- d% o) o' x3 g
Esso Sekiyu K. K. Nippon Mitsubishi Oil Corporation
( _( v7 `7 C C$ `; r9 P Exxonmobil Okinawa Sekiyu Seisei Company, Ltd.
1 ] Z7 U5 f! |% a* @ Fuji Kosan Co., Ltd. Seibu Oil Co., Ltd.
0 R2 @4 O. Q7 m$ H General Sekiyu K. K. Showa Shell Sekiyu K.K.- O: y& q3 Y$ J5 g. Z& w/ z" L" m% T2 @
Idemitsu Kosan Co., Ltd. Showa Yokkaichi Co.
0 q( _* o2 J# X1 O9 W; Z, g) S Inpex Corporation Taiyo Oil Co., Ltd.' Q" f6 `8 _6 M) S, D9 g
Japan Drilling Co., Ltd. Teikoku Oil Co., Ltd.
5 W. i3 o5 b# F& H- N6 B Japan Energy Co., Ltd. Toa Oil Co., Ltd.
) p* ~- b3 J* W5 _# U# G% i/ ^ Japan Oil Development Co., Ltd. Tonen Corporation% \6 w* H5 u$ P7 w) @3 ?
Koa Oil Co., Ltd. UNOCAL(加州石油)/ M; M9 A9 G8 ]- L1 s( l! |
Kyushu Oil Company Limited Yushiro Chemical Industry Co., Ltd. |