1. Cabinet Office, Government of Japan: White paper on aging society 2015, pp. 2–6 (2016). (in Japanese)
2. A website of the Ministry of Health, Labour and Welfare: The average life expectancy and healthy life expectancy. (in Japanese).
http://www.mhlw.go.jp/bunya/kenkou/dl/chiiki-gyousei_03_02.pdf
. Accessed 4 Feb 2017
3. A website of the Ministry of Health, Labour and Welfare: Outline of Certified Care Worker. (in Japanese).
http://www.mhlw.go.jp/kouseiroudoushou/shikaku_shiken/kaigohukushishi/
. Accessed 4 Feb 2017
4. Act on Public Health Nurses, Midwives and Nurses: Article 5 (Act No. 203 on 30 July 1948) final revision, Act No. 83 on 25 June 2014. (in Japanese)
5. Ministry of Health, Labour and Welfare: On policies concerning building and managing training facilities of certified social workers and training facilities of certified care workers, pp. 47–48, 28 March 2008. (in Japanese)