http://topics.smt.docomo.ne.jp/article/mainichi/nation/mainichi-20190116k0000m040258000c

https://headlines.yahoo.co.jp/hl?a=20190116-00000093-kyodonews-soci

https://this.kiji.is/457079699330843745?c=39546741839462401

https://mainichi.jp/articles/20181223/k00/00m/040/125000c.amp

http://www.e-hoki.com/affairs/571.html?hb=1