http://gigazine.net/news/20160905-sgnl/

http://www.tokyo-np.co.jp/article/politics/list/201609/CK2016090502000135.html

http://headlines.yahoo.co.jp/hl?a=20160904-00000066-asahi-soci

http://www.tokyo-np.co.jp/article/national/list/201609/CK2016090502000123.html

http://www.sankei.com/west/news/160905/wst1609050072-n1.html

http://www.moj.go.jp/content/001201545.pdf