1. World Health Organization. Ageing. 2022. https://www.who.int/health-topics/ageing#tab=tab_1
2. Ministry of Health, Labour and Welfare. White paper. Changes in the environment surrounding social security and people's awareness. (in Japanese). 2023. https://www.mhlw.go.jp/wp/hakusyo/kousei/22/dl/1-01.pdf
3. Prime Minister's Office. Next generation healthcare. (in Japanese). 2023. https://www.kantei.go.jp/jp/singi/keizaisaisei/portal/healthcare/index.html
4. Ministry of Health, Labour and Welfare. Outline of the medical and long-term care comprehensive security promotion law. (in Japanese). 2014. https://www.mhlw.go.jp/file/06-Seisakujouhou-12600000-Seisakutoukatsukan/0000038005_1_2.pdf
5. Ministry of Health, Labour and Welfare. Outline of 2022 Year Medical Reform (Revision version). 2022. https://www.mhlw.go.jp/content/12400000/000906904.pdf