- 2008/04 - 現在 University of Yamanashi Fuel Cell Nanomaterials Center Professor
- 2005/12 - 2008/03 Tokyo Metropolitan University Department of Applied Chemistry Research Associate and Visiting Professor
- 2003/02 - 2005/10 University of Puerto Rico Department of Chemistry Research Associate
- 2001/04 - 2003/01 Tokyo Metropolitan University Department of Applied Chemistry Research Associate
- 1998/04 - 2001/03 University of Tokyo Department of Applied Chemistry Associate Professor
- 1995/04 - 1998/03 University of Tokyo Department of Applied Chemistry Research Associate
- 1982/10 - 1995/03 Case Western Reserve University Department of Chemistry Senior Research Associate
- 1980/10 - 1982/09 Case Western Reserve University Department of Chemistry Research Associate
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