- 2013/04 - 現在 Center for Northeast Asian Studies, Tohoku University Director
- 2003/04 - 現在 Graduate School of Environmental Studies Associate Professor
- 1997/04 - 現在 Graduate School of International Cultures, Tohoku University Associate Professor
- 1996/08 - 現在 The Center for Northeast Asian Studies, Tohoku University Associate Professor
- 1996/08 - 現在 Center for Northeast Asian Studies, Tohoku University professor
- 2005/09 - 2006/03 尚絅学院大学総合人間科学部 非常勤講師
- 2000/04 - 2001/03 Faculty of Letters, Tohoku Gakuin University Part-time lecturer
- 1996/04 - 1996/07 College of Law, Nihon University Part-time lecturer
- 1996/04 - 1996/07 Tokyo University of Foreign Studies Parttime lecturer
- 1996/03 - 1996/07 Foreign Service Training Institute, Ministry of Foreign Affairs Lecturer
- 1993/04 - 1996/03 Japan Society for the Promotion Science Research Fellow
- 1992/04 - 1996/03 School of Letters, Arts and Sciences II Part-time lecturer
- 1992/04 - 1993/03 Faculty of Education, Gunma University Part-time lecturer
- 1990/04 - 1992/03 Faculty of Arts, Waseda University Assistant
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近現代東北アジア地域史研究会
, 北東アジア学会
, The Japanese Association for Manchu and Qing Studies
, Tohoku University Society for International Cultural Studies
, 早稲田大学東洋史懇話会
, 日本モンゴル学会
, 東方学会
, 内陸アジア史学会
, 史学会