http://headlines.yahoo.co.jp/hl?a=20130531-00000268-yom-soci

http://headlines.yahoo.co.jp/hl?a=20130531-00000075-san-l25

http://sankei.jp.msn.com/region/news/130531/kyt13053102010001-n1.htm

http://matimura.cocolog-nifty.com/matimulog/2013/05/barexam-3314.html#more

http://www.nikkei.com/article/DGXNASDG3003S_Q3A530C1CC1000/

http://koike-sinichiro.cocolog-nifty.com/blog/2013/05/post-99bb.html