1. Cabinet office (2014) Current status and future outlook on aging. Annual report on the aging society. 2-3,14 [serial on the Internet]. [cited 2015 September 27]: Available from http://www8.cao.go.jp/kourei/english/annualreport/2014/pdf/c1-1.pdf
2. WHO (2015) Food security [serial on the Internet]. [cited 2015 September 27]:Available from http://www.who.int/trade/glossary/story028/en/.
3. Ministry of Economy, Trade and Industry (2015) Report on the current situation of shopping difficulty, food desert issue and future measures (in Japanese) [serial on the Internet]. [cited 2015 September 27]: Available from http://www.meti.go.jp/policy/economy/distribution/kaimonoshien2010.html.
4. Ministry of Agriculture, Forestry and Fisheries, Policy research institute (2014) The situation of food access and the directionality of measures 2014. [in Japanese] [serial on the Internet]. [cited 2014 March 16]: Available from http://cse.primaff.affrc.go.jp/katsuyat/.
5. Ishikawa M, Yokoyama T, Murayama N. Relationship between geographical factorinduced food availability and food intake status; A systematic review. Jpn J Nutr Diet. 2013;71: 290–297