- 2003 - - 北海道大学言語文化部 教授
- 2003 - - Professor,
- 1988 - 2002 Hokkaido University Institute of Language and Culture Studies
- 1988 - 2002 Associate Professor,
- 1984 - 1988 Hokkaido University Institute of Language and Culture Studies
- 1984 - 1988 Lecturer,
- 1977 - 1984 Hokkaido University Faculty of Letters
- 1977 - 1984 Lecturer, Faculty of Letters,
- 1975 - 1977 Hokkaido University Faculty of Letters
- 1975 - 1977 Instructor, Faculty of Letters,
- Institute of Language and Culture Studies,
- Hokkaido University
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