http://jp.wsj.com/news/articles/SB12063707009372514535404581406731683260562

http://www.npa.go.jp/safetylife/hoan/selfcheck/start.html

http://www.asahi.com/articles/ASHDB3QXWHDBIIPE004.html

http://news.livedoor.com/article/detail/10940771/

http://www.nikkei.com/article/DGXLASDG09H5M_Q5A211C1CC0000/