http://www.nikkei.com/article/DGXLZO16873820W7A520C1TJ1000/?n_cid=DSPRM1489

http://news.livedoor.com/article/detail/13113464/

https://headlines.yahoo.co.jp/hl?a=20170523-00000392-fminpo-l07

http://www.rikkyo.ac.jp/lawschool/news/20170526_18907.html

https://headlines.yahoo.co.jp/hl?a=20170526-00000041-asahi-soci