- 1995 - 2000 Kyushu University School of Agriculture
- 1995 - 2000 Professor, Kyushu University
- 2000 - - 九州大学大学院農学研究院 教授
- 2000 - - Professor, Kyushu University
- 1987 - 1995 Kyushu University School of Agriculture
- 1987 - 1995 Associate Professor, Kyushu University
- 1964 - 1987 Kyushu University School of Agriculture
- 1964 - 1987 Assistant Professor Kyushu University
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