ご参考: https://www.weblio.jp/wkpja/content/%E8%B3%87%E7%94%9F%E5%A0%82_%E4%B8%8D%E7%A5%A5%E4%BA%8B%E3%83%BB%E8%A3%81%E5%88%A4
http://www.nicovideo.jp/watch/sm41053324