- 2010/04/01 - Professor
- 2006/04/01 - 2010/03/31 Department of Biopharmacy, College of Pharmacy, Nihon University (Laboratory of Molecular Cell Biology), Associate professor
- 2004/04 - 2006/03 Department of Biopharmacy, College of Pharmacy, Nihon University (Laboratory of Biology), Lecturer
- 1995/04 - 2004/03 Department of General Education, College of Pharmacy, Nihon University (Laboratory of Biology), Lecturer
- 1997/02/22 - 1998/02/21 Johns Hopkins University School of Medicine Neurology Visiting Professor
- 1988/04 - 1995/03 Department of General Education, College of Pharmacy, Nihon University (Laboratory of Biology), Research Assistant
- 1982/04 - 1988/03 Department of General Education, College of Science and Technology, Nihon University (Laboratory of Biology), Research Assistant
- 1979/04 - 1982/03 College of Science and Technology, Nihon University (Laboratory of Pharmacology), Research Assistant
- 1977/04 - 1979/03 Department of Pharmacy, College of Science and Technology, Nihon University (Laboratory of Pharmacology), Assistant
- Nihon University School of Pharmacy, Department of Pharmacy Professor