- 1990 - - 千葉工業大学 助教授
- 1990 - - Chiba Institute of Technology, Assistant Professor
- 1972 - 1989 Chiba Institute of Technology
- 1972 - 1989 Chiba Institute of Technology, Lecturer
- 1964 - 1971 Chiba Institute of Technology
- 1964 - 1971 Chiba Institute of Technology, Assistant
- 1963 - 1964 Sharp Corporation
- 1963 - 1964 Sharp Co., Ltd.
- Chiba Institute of Technology Faculty of Engineering, Department of Electrical, Electronics and Computer Engineering
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