http://www.nikkei.com/article/DGXMZO17370580W7A600C1000000/

https://mainichi.jp/articles/20170627/k00/00e/040/189000c

http://www.sankei.com/west/news/170627/wst1706270068-n1.html

http://www.nikkei.com/article/DGXLASDG26HFF_X20C17A6CC0000/

https://headlines.yahoo.co.jp/hl?a=20170627-00000090-jij-soci