1. Department of Civil Engineering, Faculty of Engineering, Kyushu University
2. Department of Urban and Environmental Engineering, Graduate School of Engineering, Kyushu University
3. currently Metropolitan Expressway Co., Ltd.
4. Research & Development Hq. Tamano Technology Center, Mitsui Engineering & Shipbuilding Co., Ltd.
5. Ship & Ocean Project Hq. Business Development Dept., Mitsui Engineering & Shipbuilding Co., Ltd.
6. Surface Innovation Group, Nikkei Research & Development Center, Nippon Light Metal Co., Ltd.
7. Production Division, Saidaiji Plant, Japan Exlan Co., Ltd.