http://headlines.yahoo.co.jp/hl?a=20170126-00000002-asahi-soci

http://www.sankeibiz.jp/business/news/170125/prl1701251232101-n1.htm

http://www.nhk.or.jp/sapporo-news/20170124/3266011.html

http://headlines.yahoo.co.jp/hl?a=20170127-00000083-jij-soci

http://mainichi.jp/articles/20170124/k00/00e/040/263000c