- 1988 - 1994 Kobe University
- 1988 - 1994 Kobe University, Professor
- 1994 - - 北海道大学 教授
- 1994 - - Hokkaido University, Professor
- 1976 - 1988 Kobe University
- 1976 - 1988 Kobe University, Associate Professor
- 1971 - 1976 Yamagata University
- 1971 - 1976 Yamagata University, Lecturer
- 1969 - 1970 米国オレゴン大学火山研究センター 研究員
- 1969 - 1970 The University of Tokyo
- 1969 - 1970 Center for Volcanology, University of Oregon,
- 1969 - 1970 University of Tokyo, Research Assistant
- Research Associate
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