https://news.nifty.com/amp/sports/athletic/12136-445426/
http://business.nikkeibp.co.jp/article/opinion/20150529/281769/?ST=smart
https://www.google.co.jp/amp/jp.mobile.reuters.com/article/amp/idJPKCN1GE0MY#ampshare=https://jp.reuters.com/article/tokyo-frx-lateaft-idJPKCN1GE0MY
http://www.itmedia.co.jp/news/spv/1803/02/news094.html
http://news.livedoor.com/lite/article_detail/14371140/