http://www.nikkei.com/article/DGXLZO90529880U5A810C1CC1000/

http://www.asahi.com/articles/ASH873VM0H87ONFB00G.html

http://mainichi.jp/select/news/20150814k0000m040081000c.html

http://headlines.yahoo.co.jp/videonews/fnn?a=20150813-00000045-fnn-soci

http://headlines.yahoo.co.jp/hl?a=20150813-00000005-asahi-soci