| 1984. | 1. | Research Fellow, School of Chemical Sciences, University of Illinois, Urbana-Champaign, USA |
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| 1985. | 10. | Research Associate, Faculty of Engineering, The University of Tokushima |
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| 1989. | 9. | Assistant Professor, Faculty of Engineering, The University of Tokushima |
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| 1994. | 11. | Associate Professor, Faculty of Engineering, The University of Tokushima |
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| 1996. | 10. | Visiting Scientist, Department of Chemistry and Biochemistry, University of California, Los Angeles, USA |
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| 1999. | 7. | Qualified on July, 1999 as an examiner of a screening committee of the Ph. D. thesis |
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| 2003. | 4. | Professor, Faculty of Engineering, The University of Tokushima |
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| 2006. | 4. | Professor, Institute of Technology and Science, Graduate School of the University of Tokushima |
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