- 2011/10/01 - 2013/09/30 Ippan Shadan Hojin DSIA (Durable Social Innovation Alliance) Board Member
- 2011/04/01 - 2013/03/31 Sophia University Dean of the Faculty of Liberal Arts
- 2011/04/01 - 2013/03/31 Sophia University Dean of the Faculty of Comparative Culture
- 2010/06/23 - 2012/06/22 The Institute for International Business Communication Board Member (Part-time)
- 2009/04/01 - 2011/03/31 Sophia University Dean of the Faculty of Liberal Arts
- 2009/04/01 - 2011/03/31 Sophia University Dean of the Faculty of Comparative Culture
- 2007/09/01 - 2008/06/30 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2007/01/01 - 2007/03/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2005/01/01 - 2006/03/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2003/04/01 - 2006/03/31 Sophia University Director of the Institute of Comparative Culture
- 2004/09/01 - 2004/12/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2004/04/01 - 2004/06/30 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2004/01/01 - 2004/03/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2003/09/01 - 2003/12/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2003/04/01 - 2003/06/30 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2003/01/01 - 2003/03/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2002/04/01 - 2003/03/31 Sophia University Director of the Institute of Comparative Culture
- 2002/09/01 - 2002/12/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2002/04/01 - 2002/08/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2001/04/02 - 2002/06/25 St. John's College, University of Cambridge, Cambridge, UK Visiting Professor
- 2001/07/12 - 2002/02/26 Institute of Social and Cultural Anthropology, University of Oxford, Oxford, UK Visting Professor
- 2001/07/12 - 2002/02/26 St. Antony's College, University of Oxford, Oxford, UK Visting Professor
- 2001/07/12 - 2002/02/26 Nissan Institute of Japanese Studies, University of Oxford, Oxford, UK Visiting Professor
- 2001/01/01 - 2001/03/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2000/10/01 - 2001/03/31 JAPAN EXTERNAL TRADE ORGANIZATION, IDE Part-time Lecturer
- 2000/09/01 - 2000/12/31 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 2000/04/01 - 2000/06/30 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 1999/07/01 - 1999/08/31 University of Wisconsin-Madison, Madison, Wisconsin, USA Honorary Fellow
- 1999/04/01 - 1999/06/30 Graduate School of International Relations, International University of Japan Part-time Lecturer
- 1991/04/01 - 1994/08/30 Graduate School of International Relations, International University of Japan Professor
- 1992/06/01 - 1992/06/30 Helsinki Sch. of Econ. and Bsns. Admin. Visiting Professor
- 1990/09/01 - 1991/12/31 Economics Department, Carleton University (Ottawa, Canada) Visiting Professor
- 1991/01/01 - 1991/03/31 Economics Department, University of Victoria (Victoria, Canada) Visiting Professor
- 1985/04/01 - 1991/03/31 Graduate School of International Relations, International University of Japan Associate Professor
- 1990/09/01 - 1990/12/31 Norman Patterson School of International Affairs, Carleton University (Ottawa, Canada) Visiting Professor
- 1987/01/01 - 1987/08/31 Sociology Department and Graduate School of Business, University of Wisconsin-Madison (Madison, U.S.A.) Visiting Assistant Professor
- 1985/09/01 - 1985/12/31 De La Salle University (Manila, Philippines) Visiting Professor
- 1982/09/01 - 1985/03/31 Graduate School of International Relations, International University of Japan Assistant Professor
- 1984/01/01 - 1984/04/30 Asian Institute of Management (Manila, Philippines) Visiting Researcher
- 1982/04/01 - 1982/08/31 Graduate School of International Relations, International University of Japan Research Associate
- 1980/06/01 - 1982/01/31 Department of Rural Sociology, University of Wisconsin-Madison (Madison, U.S.A.) Research Assistant, Research Associate
- 1979/08/01 - 1980/01/31 Sociology Department, University of Wisconsin-Madison (Madison, U.S.A.) Teaching Assistant
- Sophia University Faculty of Liberal Arts, Department of Liberal Arts Professor