- 2014/04/01 - Nihon University College of Bioresource Sciences
- 2012/01 - 2014/03/31 Nihon University College of Bioresource Sciences
- 2009/04 - Professor, Dept. Food Science and Technology, College of Bioresource Sciences, Nihon University
- 2007/04 - 2009/03 Professor, Dept. Food Science and Technology, College of Bioresource Sciences, Nihon University
- 2005/04 - 2008/03 Visiting Professor, Sciences of Functional Foods(Integrated Dept.),Graduate School of Agriculture, Shinsyu University
- 2003/07 - 2007/03 Corporate Fellow, R&D Management Dept. of Ajinomoto Co., Inc.
- 2001/07 - 2003/04 Director. Central Research Laboratories of Ajinomoto Co., Inc.
- 1999/07 - 2001/06 Deputy Directer, Food Research Laboratories, Ajinomoto Co., Inc.
- 1996/07 - 1999/07 Project Manager, Food Research and Development Laboratories of Ajinomoto Co., Inc.
- 1992/03 - 1996/06 Manager, Research Planning Dept. and 3rd Laboratory, Bio-polymer Research Co.
- 1989/07 - 1992/03 Assistant Manager, Development and Planning Dept. of Ajinomoto Co., inc.
- 1987/07/01 - 1989/06/30 味の素株式会社 東海工場製造部兼技術室 課長
- 1987/10 - 1989/03 Visiting lecturer, Dept. Technology, Mie University
- 1984/07 - 1987/06 Senior Researcher, Central Research Laboratories, Ajinomoto Co., Inc.
- 1971/04 - 1984/07 Researcher, Central Research Laboratories of Ajinomoto Co., Inc.
- 1983/07 - 1983/11 Visiting Research Scholar, Dept. Biochemistry, New York State University at Stony Brook
- 1978/09 - 1981/03 Visiting Researcher, Dept.Agriculture, Kyoto University
- Nihon University College of Bioresource Sciences, Department of Food Bioscience and Biotechnology Professor