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- http://www.nikkeibp.co.jp/style/biz/person/positive_worker/070116_tomita1/
- http://business.nikkeibp.co.jp/article/skillup/20070112/116806/
- http://business.nikkeibp.co.jp/article/manage/20070116/117001/
- http://business.nikkeibp.co.jp/article/manage/20070116/117001/
- http://business.nikkeibp.co.jp/article/skillup/20070112/116806/
- http://arena.nikkeibp.co.jp/col/20070115/120533/