1. Senior Research Engineer, Building Research Institute, Dr. Eng.
2. Director of Structural Research Department, Building Research Institute, Dr. Eng.
3. Senior Research Engineer, National Institute for Land and Infrastructure Management, Dr. Eng.
4. Taiheiyo Consultant, Dr. Eng.
5. Prof., Dept. of Architecture, Faculty of Science and Engineering, Tokyo Univ. of Science, Dr. Eng.