Wikipedia http://en.wikipedia.org/wiki/CanCam
demographics of the magazine's readership（Shogakukan）
http://adpocket.shogakukan.co.jp/24/index.html
demographics of the magazine's readership (Japan Magazine Publishers Association)
http://www.j-magazine.or.jp/data_002/e_shoga_canca.html
circulations(Japan Magazine Publishers Association)
http://www.j-magazine.or.jp/data_001/index.html
