http://www.news24.jp/articles/2020/01/30/04587095.html2...

https://www.nikkei.com/article/DGKKZO55048540Q0A130C2PP...

https://www.jiji.com/jc/p?id=20200130195755-00338296252...

https://www.sankei.com/politics/news/200130/plt20013000...

https://www.asahi.com/articles/ASN1Z5VD7N1ZUTFK00P.html...