http://news.livedoor.com/lite/article_detail/11076716/
http://m.car.watch.impress.co.jp/docs/news/20160115_739177.html
http://blog.livedoor.jp/kaya0169/archives/52097378.html
http://www.sankei.com/smp/economy/news/160118/ecn1601180022-s.html?pdm_ref=soe
http://www.bloomberg.co.jp/news/123-O102OWSYF01S01.html