1. 1) Ministry of Health, Labour and Welfare. 2017 Annual Report on the Ageing Society. http://www8.cao.go.jp/kourei/whitepaper/w-2017/zenbun/pdf/1s1s_01.pdf. (Accessed Apr. 21, 2019)
2. 2) Ministry of Health, Labour and Welfare. 2015 Nursing Care Insurance Business Status Report (Annual Report). http://www.mhlw.go.jp/topics/kaigo/osirase/jigyo/15/dl/h27_gaiyou.pdf. (Accessed Apr. 21, 2019)
3. 3) Ministry of Health, Labour and Welfare. 2016 National Health and Nutrition Survey. http://www.mhlw.go.jp/file/04-Houdouhappyou-10904750-Kenkoukyoku-antaisakukenkouzoushinka/kekkagaiyou _7.pdf. (Accessed Apr. 21, 2019)
4. 4) Radio Calisthenics Seventh Anniversary Journal Editorial Committee. Anytime, anywhere, anyone—seven-year history of radio calisthenics—2004, 226.
5. 5) Simple Insurance Member Association: Overview of the results of “fact-finding survey on radio calisthenics in elementary schools”. http://www.rajio-taiso.jp/taisou/shiryou/h16_research_01.html. (Accessed Apr. 21, 2019)