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Oyama, T. and Yoshii, K. (2006) Evaluation and Systematization of Policy for the Ministry of Agriculture, Forestry and Fisheries: Current Situation and Problems. In: Oyama, T., Ed., Theory and Practice for Public Policy Evaluation, Gendaitosho, Sagamihara, 281-295.

has been cited by the following article:

• TITLE: A Quantitative Factorial Component Analysis to Investigate the Recent Changes of Japan’s Weight-Based Food Self-Sufficiency Ratio

  AUTHORS: Kunihisa Yoshii, Tatsuo Oyama

  KEYWORDS: Food Self-Sufficiency Ratio, Food Security, Factorial Component Analysis

  JOURNAL NAME: American Journal of Operations Research, Vol.6 No.1, January 26, 2016

  ABSTRACT: We investigate the weight-based food self-sufficiency ratio (WSSR) for Japan over a 50-year period (1961-2011) by applying factorial component analysis technique in order to measure the changes of the WSSR quantitatively. Quantitative data analysis is employed to determine the drivers of those changes. Numerical results show that Japan experienced a drastic decline in its food self-sufficiency ratio (FSSR) during the above period. The factorial component analysis shows that such a decline was caused by the changes in the FSSR of the food groups/items, not in the quantity of the food supply. A number of characteristics of those changes are presented and a list of major food groups that have major impacts on the changes is constructed. The findings in this paper reiterate the alarming food security problem in Japan and provide clear insight into the causes of this problem. The findings in this study pick up where previous studies have left off, aid the food-related policy-making process and identify new ideas for future food research.