1. Ministry of Internal affairs and Communications, Statistics Bureau (2016) Population Estimates by Age (5 Year Age Group) and Sex—February 1, 2016 (Final estimates).
http://www.stat.go.jp/data/jinsui/pdf/201607.pdf
. Accessed 18 Aug 2016.
2. Ministry of Health, Labour and Welfare (2013) National Health and Nutrition Survey.
http://www.mhlw.go.jp/file/04-Houdouhappyou-10904750-Kenkoukyoku-Gantaisakukenkouzoushinka/0000106403.pdf
. Accessed 18 Aug 2016.
3. National Center for Geriatrics and Gerontology (2011) Research report about dysphagia.
http://www.ncgg.go.jp/ncgg-kenkyu/documents/roken/cl_hokoku1_23.pdf
. Accessed 18 Aug 2016.
4. The dysphagia diet committee of the Japanese Society of Dysphagia Rehabilitation. The Japanese Dysphagia diet 2013. Jpn J Dysphagia Rehabil. 2013;17:255–67.
5. National Dysphagia Diet Task Force. National Dysphagia Diet, standardization for optimal care. Chicago, IL: American Dietetic Association; 2002.