GOVERNMENT AND AGENCIES
- Ministry of Land,Infrastructure and Transport
- Building Research Institute
- Public Works Research Institute
- Japan Highway Public Corporation
- Hanshin Expressway Public Corporation
- Honshu-Shikoku Bridge-Highways
- Japan Regional Development Corporation(JRDC)
- Prime Minister's official residence
- Ministry of Finance
ASSOCIATIONS
- Japan Construction Information Center (JACIC)
- CALS Working Group of Japan Civil Engineering Constractors' Association
- Overseas Construction Association of Japan