- 2004 - 2005 Tohoku University Graduate School of Science
- 2005 - Tohoku University Graduate School of Life Sciences
- 1999 - 2004 Tohoku University Graduate School of Science
- 1999 - 2004 Graduate School of Science, Tohoku University, Research Assistant
- 1997 - 1999 Tohoku University Faculty of Science
- 1997 - 1999 Tohoku University, Research Assistant
- 1987 - 1997 Tohoku University Faculty of Science
- 1987 - 1997 Tohoku University, Instructor
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