1. 1. Immigration Bureau of Japan. Number of foreign residents as of the end of June 2021 (Press release, Oct. 15, 2021) https://www.moj.go.jp/isa/content/001356650.pdf (in Japanese) (Accessed May 6, 2023)
2. 2. National Institute of Social Security and Population Studies. Demographic dataset 2021 edition, Table 10-5 Sexuality, Japanese and foreign populations: 1920–2019. http://www.ipss.go.jp/syoushika/tohkei/Popular/P_Detail2021.asp?fname=T10-05.htm (in Japanese) (Accessed May 6, 2023)
3. 3. OECD. International Migration Database. https://stats.oecd.org/Index.aspx?DataSetCode=MIG (Accessed May 6, 2023)
4. 4. Immigration Bureau of Japan. Number of foreign residents as of the end of Jun. 2022 (Press release, Oct. 14, 2022) https://www.moj.go.jp/isa/publications/press/13_00028.html (in Japanese) (Accessed May 6, 2023)
5. 5. Nakashima T, Ooki S. Literature review on health issues of foreign residents in Japan. Ishikawa J Nursing 2015; 12: 93–104 (in Japanese, Abstract in English).