- 1981 - Ministry of Agriculture, Forestry and Fisheries
- 1981 - Senior Researcher, National Food Research Institute, MAFF
- 1972 - アルバートアインシュタイン医科大学研究員
- 1972 - Research fellow, Albert Einstein College of Madicin, USA
- 1967 - Ministry of Agriculture, Forestry and Fisheries
- 1967 - Researcher, National Food Research Institute, MAFF
- 1966 - Tohoku University Faculty of Agriculture
- 1966 - Research Associate, Biochemistry Lab, Tohoku University
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