- 1998 - 2001 Tokyo University of Foreign Studies
- 1998 - 2001 Tokyo University of Foreign Studies, Professor
- 1990 - 1998 The University of Tokyo
- 1990 - 1998 University of Tokyo, Associate Professor
- 1981 - 1990 The University of Tokyo
- 1981 - 1990 University of Tokyo, Research Assistant
- 1979 - 1981 テネシー大学 研究員
- 1979 - 1981 University of Tennessee, Research Fellow
- 1974 - 1979 The University of Tokyo
- 1974 - 1979 University of Tokyo, Research Assistant
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