http://japanese.joins.com/article/article.php?aid=98533&servcode=400&sectcode=420

http://trendy.nikkeibp.co.jp/article/news/20080409/1009112/ http://ascii.jp/elem/000/000/123/123773/ http://k-tai.impress.co.jp/cda/article/news_toppage/39354.html