- 1990 - 2003 Miyazaki Medical College
- 2003 - - 宮崎大学 教授
- 1982 - 1990 Miyazaki Medical College
- 1982 - 1990 Miyazaki Medical College, Associate Professor
- 1990 - - Miyazaki Medical College, Professor
- 1979 - 1982 University of Occupational and Environmental Health, Japan
- 1979 - 1982 University of Occupational and Environmental health,
- 1978 - 1979 Kyushu University School of Medicine
- 1978 - 1979 Kyushu University, Faculty of Medicine, Instructor
- 1975 - 1978 米国々立衛生研究所 訪問研究員
- 1975 - 1978 National Institute of Health, U.S.A, Visiting Associate
- 1973 - 1974 Kyushu University School of Medicine
- 1973 - 1974 Kyushu University, Faculty of Medicine, Instructor
- Assistant Professor
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