- 1996 - The University of Tokyo Institute of Industrial Science
- 1996 - University of Tokyo, Institute of Industrial
- 1990 - 株式会社東芝
- 1990 - Toshiba Corporation
- 1988 - University of California, Berkeley
- 1988 - University of California, Barkeley, Visiting
- 1981 - 株式会社東芝
- 1981 - Toshiba Corporation
- Science, Professor
- Researcher
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