- 2014/04 - 2017/03 Rissho University Faculty of Letters, Department of History
- 2014/04 - 2014/09 Tokai University School of Letters
- 2010/04 - 2011/03 Lecturer
- 2006/04 - 2008/03 Lecturer
- 2003/04 - 2005/03 Lecturer
- Rissho University Faculty of Letters, Department of History
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