| 1991. | 4. | Mitsubishi Research Institute, INC. |
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| 1996. | 4. | Research Associate at Department of Applied Chemistry, Faculty of Engineering, Muroran Institute of Technology |
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| 2001. | 4. | Associate Professor at Department of Applied Chemistry, Faculty of Engineering, Muroran Institute of Technology |
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| 2002. | 3. | Visiting Researcher at Florida State University |
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| 2003. | 4. | Visiting Researcher at Florida State University |
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| 2004. | 10. | Adjunct Associate Professor at Graduate School of Science and Engineering, Saitama University |
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| 2007. | 4. | Associate Professor at Department of Applied Chemistry, Faculty of Engineering, Muroran Institute of Technology |
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| 2009. | 4. | Associate Professor at Division of Applied Sciences, Graduate School of Engineering, Muroran Institute of Technology |
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| 2011. | 4. | Adjunct Associate Professor at Graduate School of Engineering, Kobe University |
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| 2012. | 4. | Professor at Department of Energy System, Institute of Technology and Science, The University of Tokushima |
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