http://headlines.yahoo.co.jp/hl?a=20160725-00000002-at_s-l22

http://www3.nhk.or.jp/news/html/20160725/k10010607671000.html

http://www3.nhk.or.jp/news/html/20160724/k10010606501000.html

http://news.goo.ne.jp/article/toyokeizai/business/toyokeizai-128679.html

http://matimura.cocolog-nifty.com/matimulog/2016/07/go-4861.html