- 1970 - 2004 Kanazawa Institute of Technology, Professor
- 1970 - 2004 Kanazawa Institute of Technology
- 1981 - 1981 Bell Laboratories, visiting researcher
- 1981 - ベル研究所 客員研究員
- 1980 - 1980 University of Hawaii, associate researcher
- 1980 - University of Hawaii
- 1964 - 1970 Researcher, Toshiba R & D Center
- 1964 - 1970 Toshiba Corporation
- Kanazawa Institute of Technology College of Engineering, Department of Information and Communication Engineering
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