| Name | Type | Sector | Country | Joined On |
|---|---|---|---|---|
| Sanyo Chemical Industries, Ltd. | Company | Chemicals | Japan | 2021-03-04 |
| Kuraray Co., Ltd. | Company | Chemicals | Japan | 2020-12-17 |
| NIPPON SHOKUBAI CO., LTD. | Company | Chemicals | Japan | 2020-10-19 |
| T. HASEGAWA CO., LTD. | Company | Chemicals | Japan | 2020-08-24 |
| Milbon Co., Ltd. | Company | Chemicals | Japan | 2020-05-01 |
| Mitsubishi Gas Chemical Company, Inc. | Company | Chemicals | Japan | 2020-04-30 |
| Daicel Corporation | Company | Chemicals | Japan | 2020-04-29 |
| Fujimoto Chemical Co., Ltd. | Small or Medium-sized Enterprise | Chemicals | Japan | 2020-03-10 |
| Nitto Denko Corporation | Company | Chemicals | Japan | 2020-02-24 |
| Toyobo CO., LTD | Company | Chemicals | Japan | 2020-01-22 |
| Iwase Cosfa Co., Ltd. | Small or Medium-sized Enterprise | Chemicals | Japan | 2019-11-21 |
| Tokuyama Corporation | Company | Chemicals | Japan | 2019-09-18 |