http://business.nikkeibp.co.jp/article/opinion/20130726/251577/?P=1

http://jp.reuters.com/article/oddlyEnoughNews/idJPTYE96P00120130726

http://news.livedoor.com/article/detail/7919646/

http://headlines.yahoo.co.jp/hl?a=20130731-00000021-fminpo-l07

http://www.tokyo-np.co.jp/article/column/editorial/CK2013080202000157.html

http://sankei.jp.msn.com/west/west_affairs/news/130803/waf13080307000002-n1.htm