1. Annual Report on the Ageing Society. Trends of Living of the Elderlyhttps://www8.cao.go.jp/kourei/english/annualreport/2018/pdf/c1-2-1.pdf
2. Annual Health, Labour and Welfare Report 2020. 10 Health and Welfare Services for the Elderlyhttps://www.mhlw.go.jp/english/wp/wp-hw13/dl/10e.pdf
3. The Long-Term Care Insurance System, 3. Drawing UP a Care Planhttps://www.fukushihoken.metro.tokyo.lg.jp/kourei/koho/kaigo_pamph.files/R3P6kaigohoken_Eng_7.pdf
4. Annual Report on the Ageing Society [Summary] FY 2019https://www8.cao.go.jp/kourei/english/annualreport/2019/pdf/2019.pdf
5. The current status of care manager with care worker certification, and their learning needs;Okada;Niigata J. Health Welf.,2010