| 1977. | 
					  4. | 
					Instructor at School of Medicine, the University of Yamaguchi | 
					 | 
				
				
					| 1983. | 
					  3. | 
					Assistant Professor at School of Medicine, the University of Yamaguchi | 
					 | 
				
				
					| 1983. | 
					  3. | 
					Research Fellow, Cancer Genetics, Dana-Farber Cancer Institute, Harvard medical School | 
					 | 
				
				
					| 1983. | 
					  9. | 
					Research Associate, Hormon Reseach Labo., University of California | 
					 | 
				
				
					| 1985. | 
					  9. | 
					Associate Professor at School of Medicine, the University of Kumamoto | 
					 | 
				
				
					| 1988. | 
					  5. | 
					Professor, the University of Tokushima. | 
					 | 
				
				
					| 1997. | 
					  4. | 
					Professor at the Division of Molecular Genetics, Institute for Enzyme Research, the University of Tokushima. | 
					 | 
				
				
					| 2007. | 
					  4. | 
					Professor at the Division of Molecular Genetics, Institute for Enzyme Research, the University of Tokushima. | 
					 |