- 2004/04/01 - 現在 Kokushikan University Faculty of Letters, Department of History and Geography
- - 現在 国士舘大学大学院人文科学研究科 人文科学専攻(修士課程) 教授
- - 現在 国士舘大学大学院人文科学研究科 人文科学専攻(博士課程) 教授
- 1992/04 - 2004/03 Professor
- 1984/04 - 1995/03 法政大学 第一教養部 非常勤講師
- 1991/10 - 1992/03 Yokohama National University College of Education
- 1987/04 - 1992/03 Associate Professor
- 1987/01 - 1987/05 University of Hawaii Department of Geography
- 1986/04 - 1987/03 Seisen University Faculty of Literature
- 1983/04 - 1987/03 Kokushikan University Faculty of Letters
- 1983/04 - 1984/03 Lecturer
- 1982/09 - 1983/03 Bunkyo University Faculty of Education
- 1980/08 - 1982/08 Univerisity of Michigan Department of Geography Lecturer
- 1976/08 - 1980/03 University of Hawaii Department of Geography Research Assistant
- 1969/04 - 1976/08 Kajima Corporation Foreign Relations Department
- Kokushikan University Faculty of Letters, Department of History and Geography
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