1. 1. United Nations. International convention on the protection of the rights of all migrant workers and members of their families. 1990. https://www.ohchr.org/sites/default/files/cmw.pdf (Accessed Oct. 10, 2023)
2. 2. International Labour Organization. International labour standards on migrant workers. https://www.ilo.org/global/standards/subjects-covered-by-international-labour-standards/migrant-workers/lang–en/index.htm (Accessed Oct. 10, 2023)
3. 3. Japan International Trainee & Skilled Worker Cooperation Organization. What is the technical intern training program? https://www.jitco.or.jp/en/regulation/index.html (Accessed Oct. 10, 2023)
4. 4. Ministry of Health, Labour and Welfare. [Summary of reporting status of employment of foreign nationals] (in Japanese). https://www.mhlw.go.jp/content/11655000/000887554.pdf. Published 2021. (Accessed Oct. 10, 2023)
5. 5. Organization for Technical Intern Training. [Number of technical training plan certifications by age and gender] (in Japanese). 2021. https://www.otit.go.jp/files/user/docs/PDF1-2.pdf (Accessed Oct, 10, 2023)