| 1996. | 4. | NTT Business Communications headquarters |
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| 2002. | 4. | Scientific Staff at Knowledge Media Research Center, Tuebingen, Germany |
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| 2003. | 4. | Assistant Professor, Center for Advanced Information Technology, The University of Tokushima |
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| 2009. | 8. | Associate Professor, Center for Advanced Information Technology, The University of Tokushima |
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| 2010. | 7. | Associate Professor, Center for Administration of Information Technology, The University of Tokushima |
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| 2014. | 4. | Associate Professor, Center for Administration of Information Technology, The University of Tokushima |
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| 2015. | 11. | Professor, Center for Administration of Information Technology, Tokushima University |
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| 2016. | 4. | Professor, Graduate School of Advanced Technology and Science |
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| 2017. | 4. | Professor, Center for Administration of Information Technology, Tokushima University |
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