- Kansai area Supporting member NIPPON GAS DEVELOPMENT Co.,LTD
- Kansai area Supporting member Masahisa Corporation
- Kansai area Supporting member Rigaku Corporation
- Chuugoku · Shikoku area Regular member Ebisu-Siryou Co., Ltd.
- Chuugoku · Shikoku area Regular member Ogawa Econos. Inc.
- Chuugoku · Shikoku area Regular member KANEMOTO SHOKAI Co., Ltd.
- Chuugoku · Shikoku area Regular member Kunimi Development Industry Co., Ltd.
- Chuugoku · Shikoku area Regular member Sanko Co., Ltd.
- Chuugoku · Shikoku area Regular member NITTOKU CO., LTD.
- Chuugoku · Shikoku area Regular member PUBLIC Inc.
- Chuugoku · Shikoku area Supporting member IKC co.,ltd.
- Chuugoku · Shikoku area Supporting member Sankyo Engineering Co., Ltd.
- Chuugoku · Shikoku area Supporting member Nishihara Resources Co., Ltd.
- Chuugoku · Shikoku area Supporting member FUJITA INDUSTRY Co.,Ltd.
- Chuugoku · Shikoku area Supporting member The MIIKE Inc.
- Chuugoku · Shikoku area Supporting member RYOKI Co., Ltd.
- Kyushu · Okinawa Area Regular member TAISEISHIGYO Co., Ltd.
- Kyushu · Okinawa Area Regular member Takano Environment Co., Ltd.
- Kyushu · Okinawa Area Regular member CHUO KANKYO Co., Ltd.
- Kyushu · Okinawa Area Regular member TOBUKAIHATSU Co., LTD.
- Kyushu · Okinawa Area Supporting member Tessin Transportation Co., Ltd.
- Kansai area Supporting member Kubota Corporation