https://www.youtube.com/watch?v=1S5TmzZ81uo&feature=youtu.be

http://www.sponichi.co.jp/society/news/2014/12/09/kiji/K20141209009431810.html

http://www.yomiuri.co.jp/national/20141210-OYT1T50019.html

http://headlines.yahoo.co.jp/hl?a=20141210-00000518-san-soci

http://headlines.yahoo.co.jp/hl?a=20141210-00000033-asahi-soci