Fujiwara, K. and Nagasawa, S. (2015) Analysis of Psychological Factors That Influence Preference for Luxury Food and Car Brands Targeting Japanese People. American Journal of Industrial and Business Management, 5, 590-600.
 Murakami, Y. and Murakami, C. (2008) Handbook for the Big Five Personality Inventory (Revised Edition): Introduction to the World of the Big Five Factors Starting with the Basics for Measuring Personality Traits. Gakugei Tosho, Tokyo.
 Oshio, S., Abe, S. and Custrone, P. (2012) Development, Reliability, and Validity of the Japanese Version of Ten Item Personality Inventory (TIPI-J). Japan Society of Personality Psychology, 21, 40-52.