http://www.tokyo-np.co.jp/s/article/2017061301001975.html

http://www.nikkei.com/article/DGXLASDG07H37_X00C17A6CR8000/

http://www.asahi.com/articles/ASK6G3JWWK6GUTIL00G.html

http://www3.nhk.or.jp/news/html/20170614/k10011017081000.html?utm_int=news-new_contents_list-items_006

https://headlines.yahoo.co.jp/hl?a=20170614-00006222-bengocom-soci