1. Department of Economic and Social Affairs, United Nations
World Population Prospects The 2012 Revision: Highlights and Advance Tables2013New York[cited 2015 Dec 3]. Available from: http://esa.un.org/unpd/wpp/publications/Files/WPP2012_HIGHLIGHTS.pdf
2. Cabinet Office of Japan
Heisei 23-nennban Koureisyakaihakusho: Koureikanojokyo. [White paper on aging society for 2011: the situation of the aging]2011[in Japanese]. [cited 2015 Dec 3]. Available from: http://www8.cao.go.jp/kourei/whitepaper/w-2011/gaiyou/html/s1-1-1.html
3. Ministry of Health, Labour and Welfare of Japan
Kaigokyufu to Hokennryo no sui. [The shift of benefits for long-term care and insurance premium]2014[in Japanese]. [cited 2015 Dec 3]. Available from: http://www.mhlw.go.jp/seisakunitsuite/bunya/hukushi_kaigo/kaigo_koureisha/chiiki-houkatsu/dl/link1-2.pdf
4. Ministry of Health, Labour and Welfare of Japan
Syakaihosyo no Kyufu to Futan no Genjo to Kokusaihikaku. [The current condition of social security benefits and the burdens and international comparison]2009[in Japanese]. [cited 2015 Dec 3]. Available from: http://www.mhlw.go.jp/seisaku/2009/09/03.html
5. Research Team on Long-Term Care for the Elderly
2015 nen no koresha kaigo: Koresha no songen wo sasaeru kea no kakuritsu ni mukete. [Long-term care for the elderly in 2015: toward the establishment of care supporting the dignity of the elderly]. Tokyo: MHLW2003[in Japanese]. [cited 2015 Dec 21]. Available from: http://www.mhlw.go.jp/stf/seisakunitsuite/bunya/hukushi_kaigo/kaigo_koureisha/chiiki-houkatsu/