http://www.sankei.com/world/news/150424/wor1504240011-n1.html

http://news.goo.ne.jp/article/mainichi/nation/mainichi-20150425k0000m040081000c.html

http://mainichi.jp/select/news/20150424k0000e040209000c.html

http://news.goo.ne.jp/article/jiji/nation/jiji-150424X998.html

http://www.fnn-news.com/news/headlines/articles/CONN00290996.html