- 1983 - 1996 The University of Tokyo The Institute for Solid State Physics
- 1983 - 1996 Institute for Solid State Physics, The University of Tokyo, Professor
- 1996 - - 東京理科大学 教授
- 1996 - - Tokyo University of Science Professor
- 1969 - 1983 The University of Tokyo The Institute for Solid State Physics
- 1969 - 1983 Institute for Solid State Physics, The University of Tokyo, Associate Professor
- 1960 - 1969 金属材料技術研究所 研究員
- 1960 - 1969 National Research Institute for Metals, Research Fellow
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