- 1983 - 2001 Kumamoto University
- 1983 - 2001 Kumamoto University, Professor
- 2001 - - 熊本電波工業高等専門学校 校長
- 2001 - - Kumamoto National College of Technology
- 1980 - 1983 Kumamoto University
- 1980 - 1983 Kumamoto University, Associate Professor
- 1979 - 1980 Tohoku University
- 1979 - 1980 Tohoku University, Associate Professor
- 1968 - 1979 Tohoku University
- 1968 - 1979 Tohoku University, Research Assistant
- President
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