http://mainichi.jp/select/wadai/graph/romendensha/?link_id=ctp001

http://news.goo.ne.jp/article/asahi/business/K2009010301070.html?fr=rk

http://www.varietyjapan.com/news/movie/2k1u7d00000hgn6u.html

http://www.afpbb.com/article/life-culture/culture-arts/2553970/3647218

http://gigazine.net/index.php?/news/comments/20090104_bittyu_kanachiana/

http://www.kiteru.com/vol.222/no5-vol222.htm

http://headlines.yahoo.co.jp/hl?a=20090104-00000029-jij-biz

http://it.nikkei.co.jp/business/news/index.aspx?n=AS3S26044%2004012009&landing=Next

http://www.shojihomu.co.jp/nbl/nbl090101.html

http://lawbook.cocolog-nifty.com/mamoru/2009/01/post-0d46.html http://blog.goo.ne.jp/shoe2life/e/c1ab5ea6b18948a11390ba5ee19d1632

http://www3.nhk.or.jp/news/t10013354831000.html