1. 1) Ministry of Health, Labour and Welfare. “Reiwa 2 nen (2020) Jinko Dotai Tokei Geppo Nenkei (Gaisu) no Gaikyo.”: 〈https://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai20/index.html〉, cited 28 May, 2022.
2. 2) National Cancer Center Japan, “Saishin Gan Tokei.”: 〈https://ganjoho.jp/reg_stat/statistics/stat/summary.html〉, cited 28 May, 2022.
3. 3) Ministry of Health, Labour and Welfare. “Reiwa 2 nen Shakai Iryo Shinryo Koibetsu Tokei no Gaikyo.”:〈https://www.mhlw.go.jp/toukei/saikin/hw/sinryo/tyosa20/〉, cited 28 May, 2022.
4. 4) e-Stat. “Deta Setto Ichiran.”: 〈https://www.e-stat.go.jp/stat-search/files?tclass=000001142963&cycle=7〉, cited 5 February, 2023.
5. 5) Goto E., Taira S., Hosomi M., Maki C., Nishihara M., Katsumata T., J. Jpn. Soc. Hosp. Pharm., 49, 641–647 (2013).