- 2005/04 - 現在 Professor, Chuo University
- 2023/06 - 2023/12 Thammasat University Language Institute Visiting Professor
- 2023/03 - 2023/03 Chulalongkorn University Graduate School, English as an International Language Instructor
- 2020/09 - 2022/07 The University of Tokyo College of Arts and Sciences Adjunct Lecturer
- 2021/04 - 2022/03 Gakushuin University Faculty of Letters Part-time lecturer
- 2021/02 - 2021/02 Chulalongkorn University Graduate School, English as an International Language Instructor
- 2019/07/27 - 2019/09/10 Visiting By-Fellow, Churchill College, University of Cambridge
- 2015/05 - 2019/05 Chuo University Councilor
- 2018/10/01 - 2019/03/30 Visiting Professor, Language Institute, Thammasat University, Thailand
- 2018/03/30 - 2018/09/30 Visiting By-Fellow, Churchill College, University of Cambridge
- 2016/07 - 2016/10 Universiti Teknologi Malaysia Language Academy Visiting Professor
- 2011/01 - 2014/11 Chuo University Vice President
- 2011/10 - 2012/03 Tokyo University of Foreign Studies Graduate School of Global Studies Part-time lecturer
- 2009/10 - 2012/03 Shizuoka University Faculty of Humanities Part-time lecturer
- 2010/04 - 2011/03 Tokyo Keizai University Part-time lecturer
- 2008/04 - 2011/03 Tokyo Gakugei University Faculty of Education Part-time lecturer
- 2009/04 - 2010/03 Gakushuin University Faculty of Literature Adjunct Lecturer
- 2009/04 - 2010/03 Tokyo University of Foreign Studies Graduate School of Global Studies Part-time lecturer
- 2008/08 - 2008/08 University of Tsukuba Graduate School of Humanities and Social Sciences
- 2008/08 - 2008/08 Part-time lecturer, Tsukuba University
- 2002/07 - 2007/12 University of Greenwich MA in language Learning and Japanese Language Teaching External Examiner
- 2002/07 - 2007/12 External Examiner, MA in language Learning and Japanese Language Teaching, University of Greenwich
- 2005/04 - 2006/03 Osaka University of Foreign Studies Faculty of Foreign Studies Part-time lecturer
- 2004/04 - 2005/03 Waseda University Graduate School of Education Part-time lecturer
- 2004/04 - 2005/03 Gunma Prefectural Women's University English language, British and American Literature Professor
- 1999/04 - 2004/03 Gunma Prefectural Women's University Faculty of Arts, Department of English language, British and American Literature Associate Professor
- 2002/07 - 2002/08 University of Cambridge Research Centre for English and Applied Linguistics Visiting Fellow
- 2002/04 - 2002/08 University of Essex Department of Language and Linguistics Visiting Professor
- 1998/04 - 2000/03 Waseda University School of Education Part-time lecturer
- 1999/12 - 1999/12 Shizuoka University Faculty of Education Part-time lecturer
- 1997/04 - 1999/03 Gunma Prefectural Women's University English Language, British and American Literature Lecturer
- 1995/10 - 1997/01 The University of Cambridge Local Examinations Syndicate The Board of Examinations in Japanese Language Member
- 1995/10 - 1997/01 The University of Cambridge Local Examinations Syndicate, a member of the board of examinations in Japanese language
- 1996/02 - 1996/10 Cambridge Parkside Community College Part-time lecturer
- 1995/01 - 1996/10 Cambridge Arts and Science College Part-time lecturer
- 1995/01 - 1995/03 University of Cambridge Research Centre for English and Applied Linguistics, M Phil in English and Applied Linguistics Tutor
- 1995/01 - 1995/03 University of Cambridge, Research Centre for English and Applied Linguistics, M Phil in English and Applied Linguistics, Tutor
- 1993/04 - 1995/01 Institute of International Education in London Japanese Language Teacher Training Course Part-time lecturer
- 1994/01 - 1994/03 University of Cambridge Research Centre for English and Applied Linguistics, MA in English and Applied Linguistics Tutor
- 1987/04 - 1992/03 Nabari Nishi Senior High School, Foreign Language (English) teacher
- 1984/04 - 1987/03 Nansei Senior High School Foreign language (English) teacher