- 2023/04 - 現在 Keio University Faculty of Letters Part-time instructor
- 2021/04 - 現在 Aoyama Gakuin University "College of Education, Psychology and Human Studies" Part-time instructor
- 2016/04 - 現在 Chuo University Faculty of Letters Professor
- 2015/04 - 現在 The University of Tokyo Faculty of Education Part-time instructor
- 2012/04 - 現在 Tsurumi University Librarian Course Part-time instructor
- 2022/06 - 2023/06 RMIT University "School of Global, Urban, Social Studies" Visiting Professor
- 2016/04 - 2018/03 Nihon University College of Humanities and Sciences Part-time instructor
- 2011/03 - 2017/03 Chiba University Library Innovation Center Visiting Scholar
- 2014/04 - 2016/03 Nihon University College of Humanities and Sciences Professor
- 2011/04 - 2016/03 Chiba University Center for General Education Part-time instructor
- 2000/04 - 2016/03 Chuo University Faculty of Letters Part-time instructor
- 2013/09 - 2015/03 National Institute of Informatics Visiting Scholar
- 2010/04 - 2014/03 Nihon University College of Humanities and Sciences Associate Professor
- 2010/04 - 2013/03 Mie University "Research Development Office, Library" Visiting Scholar
- 2007/04 - 2010/03 Mie University "Faculty of Humanities, Law and Economics" Associate Professor
- 2006/07 - 2007/03 National Institute of Informatics "Scholarly and Academic Information Division, Cyber Science Infrastructure Development Department" Chief
- 2004/04 - 2006/06 The University of Tokyo "Digital Library Division, Information Technology Center" Librarian
- 2000/04 - 2006/03 Sanno College Librarian Course Part-time instructor
- 2001/04 - 2004/03 The University of Tokyo "Information Management Division, General Library" Librarian
- 2001/01 - 2001/03 "Ministry of Education, Culture, Sports, Science and Technology" "Academic Libraries Section, Scientific Research Institutes Division, Research Promotion Bureau" Officer
- 2000/04 - 2001/01 "Ministry of Education, Science and Culture" "Academic Libraries Section, Academic Information Division, Science and International Affairs Bureau" Officer
- 1997/04 - 2000/03 The University of Tokyo "Information Service Division, General Library" Library Staff