- 1992 - 2004 Kindai University
- 1992 - 2004 Kinki University, Professor
- 1983 - 1992 Kindai University
- 1983 - 1992 Kinki University, Associate Professor
- 1976 - 1983 Kindai University
- 1976 - 1983 Kinki University, Lecturer
- 1970 - 1976 Kindai University
- 1970 - 1976 Kinki University, Research Assistant
- 1965 - 1967 三菱電機株式会社中央研究所 技師
- 1965 - 1967 Mitsubishi Electric Company, Engineer
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