1. Ministry of Health, Labour and Welfare, Council of Social Security, Medical Section (Conference material of the meeting on Nov 11, 2010). http://www.mhlw.go.jp/stf/shingi/2r9852000000w95c-att/2r9852000000w9ok.pdf . Accessed 19 Jul 2015 (in Japanese)
2. Ministry of Health, Labour and Welfare, Health Policy Bureau. The first conference concerning the quota of medical students of the future, etc.(Conference material of the meeting entitled “The current situation surrounding doctors, etc.”). http://www.mext.go.jp/b_menu/shingi/chousa/koutou/043/siryo/__icsFiles/afieldfile/2011/01/18/1300372_2.pdf . Accessed 19 Apr 2015 (in Japanese)
3. Ministry of Health, Labour and Welfare, recently-released statistical data. http://www.mhlw.go.jp/toukei/saikin/hw/ishi/12/dl/toukeihyo.pdf . Accessed 19 Jul 2015 (in Japanese)
4. Tomizawa Y, Kawase K, Yorozuya K et al (2009) Current status of support for female doctors in the specialist medical societies of the Japanese Association of Medical Sciences: results of a questionnaire survey. Nippon Geka Gakkai Zasshi 110(3):154–161 (in Japanese)
5. Lockley SW, Cronin JW, Evans EE et al (2004) Effect of reducing interns’ weekly work hours on sleep and attentional failures. N Engl J Med 351(18):1829–1837