http://www.asahi.com/articles/TKY201311020009.html

http://www3.nhk.or.jp/news/html/20131103/k10015769651000.html

http://trendy.nikkeibp.co.jp/article/pickup/20131031/1053263/?ST=life&P=2

http://www.afpbb.com/articles/-/3002537

http://news.goo.ne.jp/article/asahi/nation/OSK201311030014.html

http://news.goo.ne.jp/article/sankei/nation/snk20131102523.html