1. Patient survey (Number of hospitalized patients) [https://www.mhlw.go.jp/toukei/saikin/hw/kanja/17/dl/01.pdf].
2. Demographic and Patient Dynamics to 2040 [https://www.mhlw.go.jp/content/10800000/000906891.pdf].
3. Current population survey [https://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai22/dl/gaikyouR4.pdf].
4. Current population survey [https://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai17/dl/gaikyou29.pdf].
5. Deaths: leading causes for 2020;Curtin;Natl Vital Stat Rep,2023