Country | Organization | Accession year | Certificate |
Japan | Marui & Co., Ltd., Osaka, Japan | 2004 | 2018 certificate |
Japan | Okuyama Boring Co., Ltd., Yokote, Japan | 2011 | 2018 certificate |
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 |