- 1992 - 2003 京都大学総合人間学部助教授
- 1992 - 2003 Associate Professor,
- 2003 - - 京都大学理学研究科助教授
- 2003 - - Associate Professor,
- 1991 - 1992 京都大学教養部助教授
- 1991 - 1992 Associate Professor,
- 1990 - 1991 Rutgers University, Visiting Researcher
- 1990 - 1991 Visiting Researcher, Department of Mathematics,
- 1989 - 1990 Gakushuin University Faculty of Science
- 1989 - 1990 Research Associate, Faculty of Science,
- Graduate School of Science, Kyoto University
- Faculty of Human Science, Kyoto University
- Kyoto University
- College of Liberal Arts and Sciences,
- Rutgers University
- Gakushuin University
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