- 1999 - 2001 Yamagata University
- 1999 - 2001 Yamagata University, Research Assistant
- 1997 - 1999 University of California, San Diego
- 1997 - 1999 University of California, San Diego Research Fellow
- 1997 - - 山形大学助手
- 1997 - - Yamagata University, Research Assistant
- Yamagata University Faculty of Medicine-Hospital
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