- 1996 - 現在 National Institute of Technology, Hakodate College
- 1980 - 1996 National Institute of Technology, Hakodate College
- 1980 - 1996 Assistant Professor, Department of
- 1996 - - Professor, Department of Material and
- 1975 - 1980 National Institute of Technology, Hakodate College
- 1975 - 1980 Lecturer, Department of Industrial
- 1970 - 1975 National Institute of Technology, Hakodate College
- 1970 - 1975 Research Associate, Department of
- Environmental Engineering, Hakodate Technical
- Chemistry Hakodate Technical College
- College
- Industrial Chemistry Hakodate Technical
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