http://www.asahi.com/articles/ASGDM2W44GDMUHBI00L.html

http://headlines.yahoo.co.jp/hl?a=20141220-00000039-mai-soci

http://www3.nhk.or.jp/shutoken-news/20141218/4084931.html

http://kounomaki.blog84.fc2.com/

http://news.goo.ne.jp/article/mainichi/nation/mainichi-20141220k0000e040200000c.html