As of April 16,2013
| Oil Refining and Marketing Firms | Engineering and Other Firms |
|---|---|
| AOC HOLDINGS, INC. | AZBIL CORPORATION |
| COSMO OIL CO., LTD. | CHIYODA CORPORATION |
| EMG MARKETING GODO KAISYA | COSMO ENGINEERING CO., LTD. |
| IDEMITSU KOSAN CO., LTD. | COSMO RESEARCH INSTITUTE, INC. |
| JX NIPPON OIL & ENERGY CORPORATION | IDEMITSU ENGINEERING CO., LTD. |
| KYOKUTO PETROLEUM INDUSTRIES LTD. | IHI CORPORATION |
| SEIBU OIL CO., LTD. | JGC CATALYSTS AND CHEMICALS LTD. |
| SHOWA SHELL SEKIYU K.K. | JGC CORPORATION |
| SHOWA YOKKAICHI SEKIYU CO., LTD. | JX ENGINEERING CORPORATION |
| TAIYO OIL CO., LTD. | JX NIPPON RESEARCH INSTITUTE, LTD. |
| TOA OIL CO., LTD. | KAWASAKI HEAVY INDUSTRIES,LTD. |
| TONEN GENERAL SEKIYU K.K. | KOBE STEEL LTD. |
| MITSUBISHI CORPORATION | |
| SHIMIZU CORPORATION | |
| TOYO ENGINEERING CORPORATION | |
| YOKOGAWA ELECTRIC CORPORATION | |
| Financial Institutions | |
| THE MIZUHO BANK, LTD. | |
| THE BANK OF TOKYO-MITSUBISHI UFJ, LTD. | |