| 1994. | 4. | Technical Assistant, Department of Chemistry, College of Science and Technology, Aoyama Gakuin University |
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| 1995. | 4. | Assistant professor, Department of Chemistry, College of Science and Technology, Aoyama Gakuin University |
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| 2000. | 4. | Assistant professor, Institute of Biomolecular Science, Gakushuin University |
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| 2001. | 4. | Assistant professor, Department of Mathematical and Natural Sciences,Faculty of Integrated Arts and Sciences, The University of Tokushima |
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| 2003. | 4. | Lecturer,Department of Mathematical and Natural Sciences, Faculty of Integrated Arts and Sciences, The University of Tokushima |
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| 2003. | 4. | Lecturer, Graduate school of Human and Natural Environment Sciences, The University of Tokushima |
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| 2007. | 4. | Associate Professor, Department of Mathematical and Natural Sciences,Faculty of Integrated Arts and Sciences, The University of Tokushima |
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| 2007. | 4. | Associate Professor, Graduate school of Human and Natural Environment Sciences, The University of Tokushima |
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| 2007. | 4. | Lecturer, School of Health Sciences, Faculty of Medicine, The University of Tokushima (by-work) |
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| 2009. | 4. | Center for General Education (by-work, --Mar.2011), The University of Tokushima |
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| 2009. | 4. | Associate professor, Institute of Socio-Arts and Sciences, The University of Tokushima |
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| 2009. | 4. | Associate Professor, Department of Civil and Environmental Studies, Faculty of Integrated Arts and Sciences, The University of Tokushima |
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| 2009. | 4. | Associate Professor, The Master Course of Regional Science, Graduate School of Integrated Arts and Sciences, The University of Tokushima |
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| 2012. | 4. | Center for General Education (by-work), The University of Tokushima |
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