- markting (Otaru University of Commerce)
- international enterprise (Nagasaki University of Foreign Studies)
- marketing (Nagasaki Junshin Catholic University)
- marketing research (Nagasaki University, Faculty of Economics)
- marketing (Nagasaki University, Faculty of Economics)
- marketing and consumer behavior (The Open University of Japan)
- Economics
- consumer behavior (Hokkai-Gakuen University)