| Country |
Organization |
Accession year |
Certificate |
| Italy |
IDS Georadar s.r.l |
2018 |
2018 certificate |
| Japan |
Central Japan Railway Company |
2018 |
2018 certificate |
| Japan |
GODAI Development Corp., Kanazawa, Japan |
2004 |
2018 certificate |
| Japan |
Japan Conservation Engineers & Co., Ltd., Tokyo, Japan |
2004 |
2018 certificate |
| Japan |
Kokusai Kogyo Co., Ltd., Tokyo, Japan |
2004 |
2018 certificate |
| Japan |
Nippon Koei Co., LTD. |
2018 |
2018 certificate |
| Japan |
Ohta Geo-Research Co., Ltd., Nishinomiya, Japan |
2004 |
2018 certificate |
| Japan |
OSASI Technos Inc., Kochi, Japan |
2004 |
2018 certificate |
| Japan |
OYO Corporation, Tokyo, Japan |
2004 |
2018 certificate |
| Japan |
Sabo & Landslide Technical Center, Tokyo, Japan |
2004 |
2018 certificate |
| Japan |
Sakata Denki Co., Ltd., Tokyo, Japan |
2004 |
2018 certificate |
| Chinese Taipei |
Sinotech Engineering Consultants, Inc. |
2018 |
2018 certificate |
