http://www.sankei.com/affairs/news/170119/afr1701190001-n1.html

http://shukan.bunshun.jp/articles/-/6982

http://headlines.yahoo.co.jp/hl?a=20170119-00014996-kana-l14

http://www.nikkei.com/article/DGXLASDG13HCD_X10C17A1CC1000/

http://kanz.jp/hanrei/detail/86448/