2007-09-12 ■ http://www.nikkeibp.co.jp/sj/2/column/aa/71/ http://business.nikkeibp.co.jp/article/skillup/20070905/134098/ http://business.nikkeibp.co.jp/article/person/20070821/132679/ http://business.nikkeibp.co.jp/article/money/20070904/133989/