1. Department of Mechanical Engineering, National Institute of Technology (KOSEN), Gifu College
2. Department of Mechanical Engineering, National Institute of Technology (KOSEN), Akita College, now Air Water Performance Chemicals Inc.
3. Department of Mechanical Engineering, National Institute of Technology (KOSEN), Akita College, now School of Creative System Engineering, Advanced Engineering Faculty, National Institute of Technology (KOSEN), Akita College