| Andoh Parachemie Co., Ltd. | Idemitsu Kosan Co., Ltd. |
| Itochu Chemical Frontier Corporation | Itochu Corporation |
| SAN-AI OBBLI CO., LTD. | GYXIS Corporation |
| Shin-Etsu Chemical Co., Ltd. | Sumitomo Osaka Cement Co., Ltd. |
| Sumitomo Chemical Co., Ltd. | Sumitomo Corporation |
| Sumitomo Shoji Chemicals Co., Ltd. | Saibu Gas Energy Co., Ltd. |
| Sojitz Corporation | Taiyo Oil Co., Ltd. |
| Denka Co., Ltd. | Tosoh Corporation |
| Toyotsu Chemiplas Corporation | Toyota Tsusho Corporation |
| Zeon Corporation | Japan Biofuels Supply LLP (JBSL) |
| Maruzen Petrochemical Co., Ltd. | Marubeni Corporation |
| Mitsui Chemicals, Inc. | Mitsui & Co., Ltd. |
| MITSUI BUSSAN CHEMICALS CO.,LTD. | Mitsubishi Corporation |
| Mitsubishi Shoji Chemical Corporation | Methanex Corporation Japan Ltd. |
| Resonac Corporation | BASF PETORONAS CHEMICALS SDN BHD MALAYSIA |
| BASF SOUTH EAST ASIA PTE LTD. | COVESTRO (HONG KONG) LIMITED |
| DOW CHEMICAL PACIFIC LIMITED | ENEOS Globe Corporation |
| ENEOS Corporation | HELM ASIA PTE LTD |
| INEOS EUROP AG | KANEKA MS MALAYSIA SDN. BHD. |
| KH Neochem Co., Ltd. | PETRONAS CHEMICALS DERIVATIVES SDN. BHD. |
| PTT GC OXIRANE CO.,LTD. | S-OIL CORPORATION |
| Shell International Eastern Trading Company Ltd.(SIETCO) | |
