1. World Bank Data https://data.worldbank.org/indicator/SP.POP.TOTL 2016
2. Komine T Thinking about the 2025 problem-Part 1: population change and the 2025 problem 2015 http://www.iips.org/en/research/IIPS.pdf
3. Annual Report on the Aging Society: 2012 Tokyo, Japan: Cabinet Office, Japan July 2012
4. Number of elderly persons with dementia 2012 http://www.mhlw.go.jp/stf/houdou/2r9852000002iau1-att/2r9852000002iavi.pdf
5. Alzheimer's Association Alzheimer's and dementia in Japan https://www.alz.org/jp/dementia-alzheimers-japan.asp