https://www.youtube.com/watch?v=BPDUZg9fFiA&feature=youtu.be

https://www.youtube.com/watch?v=RlOaxe5C2nE

http://www.yomiuri.co.jp/national/news/20131117-OYT1T00198.htm

http://ameblo.jp/gisummer/entry-11690549123.html

整備法４６条 http://law.e-gov.go.jp/htmldata/H18/H18HO050.html