1. World Health Organization. Monitoring the geographical distribution of the health workforce in rural and underserved areas. [http://www.who.int/entity/workforcealliance/knowledge/resources/monitoring_geodistribution/en/] Accessed 13 July 2014.
2. Organization for Economic Cooperation and Development. OECD Factbook 2014. Economic, environmental and social statistics. [http://www.oecd-ilibrary.org/economics/oecd-factbook-2014_factbook-2014-en] Accessed 13 July 2014.
3. Ministry of Education, Culture, Sports, Science and Technology. [http://www.mext.go.jp/b_menu/houdou/24/12/1328793.htm] (in Japanese) Accessed 13 July 2014.
4. Yuji K, Imoto S, Yamaguchi R, Matsumura T, Murashige N, Kodama Y, et al. Forecasting Japan’s physician shortage in 2035 as the first full-fledged aged society. PLoS One. 2012;7:e50410.
5. Toyabe S. Trend in geographic distribution of physicians in Japan. Int J Equity Health. 2009;8:5.