- 2013/04 - 現在 学習院大学 客員研究員
- 2013/04 - 現在 客員研究員
- 1989/04 - 現在 International Christian University Division of International Studies Assistant Professor of Linguistics
- 1993 - 1995 De La Salle University, Manila Department of Language and Lingustics British Council Visiting Professor
- 1993 - 1995 De La Salle University, Manila Department of Language and Lingustics British Council Visiting Professor
- 1992/04 - 1993/03 University of the Sacred Heart, Tokyo Department of Psychology Lecturer (PT) in Linguistics
- 1992/04 - 1993/03 University of the Sacred Heart, Tokyo Department of Psychology Lecturer (PT) in Linguistics
- 1989/04 - 1990/03 Waseda University, Tokyo Department of Commerce Lecturer (PT) in English
- 1989/04 - 1990/03 Waseda University, Tokyo Department of Commerce Lecturer (PT) in English
- 1988/04 - 1989/03 International Christian University Division of International Studies Visiting Assistant Professor of Linguistics
- 1986/09 - 1987/07 University of Edinburgh, Edinburgh Department of East Asian Studies Lecturer (Linguistics)
- 1986/09 - 1987/07 University of Edinburgh, Edinburgh Department of East Asian Studies Lecturer (Linguistics)
- 1984/09 - 1986/07 University of Edinburgh, Edinburgh Institute for Applied Language Studies Instructor (PT) in English Language & Teacher Training
- 1984/09 - 1986/07 University of Edinburgh, Edinburgh Institute for Applied Language Studies Instructor (PT) in English Language & Teacher Training
- 1981/04 - 1982/09 University of Michigan, Ann Arbor English Language Institute Teaching Assistant (PT)
- 1981/04 - 1982/09 University of Michigan, Ann Arbor English Language Institute Teaching Assistant (PT)
- 1978/04 - 1981/03 University of Shimane, Matsue/Izumo Faculty of Medicine Lecturer in English
- 1978/04 - 1981/03 University of Shimane, Matsue/Izumo Faculty of Medicine Lecturer in English
- Graduate School, School of Arts and Sciences Master's Course, Public Policy and Social Research Program
- Graduate School, School of Arts and Sciences Doctoral Course, Ph. D. Program
- Graduate School, School of Arts and Sciences Master's Course, Public Policy and Social Research Program
- Graduate School, School of Arts and Sciences Doctoral Course, Ph. D. Program