https://www.nikkei.com/article/DGKKZO26179970W8A120C1TCJ000/

https://www.kobe-np.co.jp/news/jiken/201801/0010944548.shtml

https://headlines.yahoo.co.jp/hl?a=20180131-00000005-ryu-oki

https://headlines.yahoo.co.jp/hl?a=20180131-00010001-nishinpc-soci

https://mainichi.jp/articles/20180131/k00/00e/040/300000c