- 1976 - 1986 Osaka Institute of Technology
- 1976 - 1986 Osaka Institute of Technology, assistant professor
- 1986 - - 大阪工業大学 教授
- 1986 - - Osaka Institute of Technology, Professor
- 1971 - 1976 Osaka Institute of Technology
- 1971 - 1976 Osaka Institute of Technology, fulltime lecture
- 1967 - 1971 大阪市立衛生研究所 研究員
- 1967 - 1971 Osaka Institute of Hygiene, Investigator
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