http://www.yomiuri.co.jp/e-japan/tottori/news/20131104-OYT8T00684.htm

http://gigazine.net/news/20131102-first-time-americans-favor-legalizing-marijuana/

http://mainichi.jp/opinion/news/20131105k0000m070107000c.html

http://headlines.yahoo.co.jp/hl?a=20131105-00000018-mai-soci

http://www.yomiuri.co.jp/national/news/20131105-OYT1T00144.htm

http://www.47news.jp/CN/201311/CN2013110501001945.html