- 2008/04 - 現在 Iwate Prefectural University Faculty of Policy Studies Professor
- 1998/04 - 現在 Iwate Prefectural University Morioka Junior College Lecturer(Part-time)
- 1998/04/01 - 現在 Iwate Prefectural University Morioka Junior College Lecturer(Part-time)
- 2017/04 - 2018/03 University of California at Berkeley Department of Mathematics Visiting Scholar
- 2016/04 - 2016/09 Yamagata University Faculty of Science Lecturer(Part-time)
- 2011/04/01 - 2011/09/30 Iwate University Faculty of Engineering Lecturer(Part-time)
- 2011/04 - 2011/09 Iwate University Faculty of Engineering Lecturer(Part-time)
- 2010/04/01 - 2010/09/30 Iwate University Faculty of Engineering Lecturer(Part-time)
- 2010/04 - 2010/09 Iwate University Faculty of Engineering Lecturer(Part-time)
- 2007/04 - 2008/03 Iwate Prefectural University Faculty of Policy Studies Associate Professor
- 1998/04 - 2007/03 Iwate Prefectural University Faculty of Policy Studies Associate Professor (as old post name)
- 1997/01 - 1998/03 Yamaguchi University Faculty of Engineering Associate Professor (as old post name)
- 1994/04 - 1996/12 Yamaguchi University Faculty of Engineering Lecturer
- 1990/04 - 1994/03 Tokyo Denki University College of Science and Engineering Research Assistant
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