- 1991 - 現在 Professor, Faculty of Foreign Languages,
- 1979 - 1991 Tokyo University of Foreign Studies
- 1979 - 1991 Associate Professor, Faculty of Foreign
- 1991 - - 東京外国語大学 教授
- 1976 - 1979 Tokyo Metropolitan University
- 1976 - 1979 Associate Professor, Faculty of Humanities,
- 1973 - 1976 Institut für deutsche Sprache専任研究員
- 1973 - 1976 Research Associate, Institut für deutsche
- 1971 - 1973 Kumamoto University
- 1971 - 1973 Lecturer, Faculty of Liberal Arts College,
- 1969 - 1971 Kumamoto University
- 1969 - 1971 Teaching and Research Associate, Faculty of
- Tokyo University of Foreign Studies
- Languages, Tokyo University of Foreign Studies
- Tokyo Metropolitan University
- Sprache
- Kumamoto University
- Liberal Arts College, Kumamoto University
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