- - 2005 Osaka City University
- - 2005 Osaka City University Graduate School, Division of Administration
- - 2000 Osaka City University
- - 2000 Osaka City University Graduate School, Division of Administration
- - 1997 Hirosaki University Faculty of Humanities
- - 1997 Hirosaki University Faculty of Humanities
- - 1995 Hirosaki University Faculty of Humanities
- - 1995 Hirosaki University Faculty of Humanities
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