- 2013/01 - 現在 Associate in Research, The Edwin O. Reishauer Institute of Japanese Studies, Harvard University
- 2007/04 - 現在 Professor, Department of Sociology, Hosei University
- 2021/04 - 2023/12 Nanjing University School of Sociology Visiting Professor
- 2018/04/01 - 2020/03/31 Visiting Scholar, Graduate School of Sociology, Keio Univeristy
- 2017/04/01 - 2020/03/31 Lecturer, Department of Sociology, Graduate School of Human Relations, Keio University
- 2018/04 - 2020/03 Visiting Scholar, Graduate School of Sociology, Keio Univeristy
- 2017/04 - 2020/03 Lecturer, Department of Sociology, Graduate School of Human Relations, Keio University
- 2015/04 - 2016/08 Lecturer, Department of Architecture, Kogakuin University
- 2013/04/01 - 2014/03/31 Visiting Scholar, Graduate School of Sociology, Keio Univeristy
- 2013/04 - 2014/03 Visiting Scholar, Graduate School of Sociology, Keio Univeristy
- 2012/04 - 2013/03 Lecturer, Department of Sociology, the University of Tokyo
- 2010/04 - 2012/03 Lecturer, Department of Political Science, Keio University
- 2008/04 - 2010/03 Lecturer, Department of Sociology, Keio University
- 2006/09 - 2007/03 Department of Sociology, Tokyo Women's Christian University
- 2001/04 - 2007/03 Associate Professor, Department of Sociology, Hosei University
- 2004/04 - 2006/03 Visiting Scholar, The Edwin O. Reischauer Institute of Japanese Studies, Harvard University (Cambridge, Massacgusetts, U.S.A.)
- 2001/04 - 2003/03 Visiting Associate Professor, Graduate School of Humanities and Sociology, the University of Tokyo
- 1997/04 - 2001/03 Assistant Professor, Department of Sociology, Hosei University
- 1999/04 - 2000/03 Department of Engineering, University of Chiba
- 1999/04 - 2000/03 Department of Political Science, Keio University
- 1995/08 - 1997/03 Research Associate, Department of Sociology, University of Chiba
- 1992/04 - 1997/03 Ryutsu Keizai University
- 1995/04 - 1996/03 Department of Sociology, Hosei University
- 1995/04 - 1996/03 Department of Sociology, Toyo University
- 1994/04 - 1995/07 Post-Doctoral Fellow, the Japan Society for the Promotion of Science
- 1994/04/01 - 1995/07/01 Post-Doctoral Fellow, the Japan Society for the Promotion of Science
- 1992/09 - 1993/12 国立伊東温泉病院附属看護学校 非常勤講師
- 1990/04 - 1991/03 Graduate School of Human Relations, Keio University
- 1987/04 - 1988/03 Graduate School of Human Relations, Keio Univeristy