1981-1986 Physician, 1st Department of Internal Medicine, Shinshu University Hospital (SUH)
1987-1989 Postdoctoral fellow, Medical University of South Carolina, USA
1989-1996 Physician, 1st Department of Internal Medicine, SUH
1996-1999 Assistant professor, Department of Laboratory Medicine, Shinshu University School of Medicine (SUMS)
1999-2008 Associate professor, Department of Laboratory Medicine, SUMS
2008-2020 Chairman and Professor, Department of Laboratory Medicine, SUMS
2014-2017 Deputy director, SUH
2017-2020 Director, SUH
2022-Chairman, Nagano Prefectural Hospital Organization
