http://mainichi.jp/life/edu/daijyobu/news/20110109ddm013070035000c.html http://megalodon.jp/2011-0109-1751-17/mainichi.jp/life/edu/daijyobu/news/20110109ddm013070035000c.html

http://blog.goo.ne.jp/tokyodo-2005/e/c6bfa3d004f99fff857124f551e9a366

http://kaikennow.blog110.fc2.com/blog-entry-20.html