- 1992 - 2000 Oita University
- 1992 - 2000 Oita University, Professor
- 2000 - - 九州工業大学 教授
- 2000 - - Kyushu Institute of Technology, Professor
- 1981 - 1992 Oita University
- 1981 - 1992 Oita University, Associate Professor
- 1980 - 1981 Oita University
- 1980 - 1981 Oita University, Assistant Professor
- 1977 - 1980 Kyushu University
- 1977 - 1980 Kyushu University, Research Associate
- Kyushu Institute of Technology Faculty of Computer Science and Systems Engineering Department of Artificial Intelligence Professor
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