http://style.nikkei.com/article/DGXNASFK05008_V00C12A8000000?channel=DF140920160919
http://syachiraku.com/archives/20170509/daily-f1-news-may-9-2017.html
https://m.finance.yahoo.co.jp/fx/news/detail/20170514-00222138-zaifxf-fx
https://www.google.co.jp/amp/s/www.cnn.co.jp/amp/article/35101106.html#ampshare=https://www.cnn.co.jp/usa/35101106.html
https://www.google.co.jp/amp/s/japan.zdnet.com/amp/article/35100422/#ampshare=https://japan.zdnet.com/article/35100422/