1. 1. Ministry of Health, Labour and Welfare. Public assistance system. 2012. http://www.mhlw.go.jp/english/wp/wp-hw5/dl/23010809e.pdf. Accessed 13 February 2018.
2. 2. Ministry of Justice. Public Assistance Act. 1950. http://www.japaneselawtranslation.go.jp/law/detail_main?vm=&id=24. Accessed 13 February 2018 (in Japanese).
3. 3. Ministry of Health, Labour and Welfare. National Survey on Public Assistance Recipients in 2015. 2016. https://www.e-stat.go.jp/stat-search/files?page=1&layout=datalist&toukei=00450312&tstat=000001089175&cycle=7&tclass1=000001089215&result_page=1&second=1&second2=1. Accessed 13 February 2018 (in Japanese).
4. 4. Statistics Bureau, Ministry of Internal Affairs and Communications. The 2015 Population Census. 2016. http://www.e-stat.go.jp/SG1/estat/GL08020103.do?_csvDownload_&fileId=000007809775&releaseCount=3. Accessed 13 February 2018 (in Japanese).
5. 5. Ministry of Health, Labour and Welfare. Fact-finding Survey on Medical Assistance. 2017. http://www.e-stat.go.jp/SG1/estat/GL08020103.do?_toGL08020103_&listID=000001170005&requestSender=dsearch. Accessed 13 February 2018 (in Japanese).