twitter2014 http://itpro.nikkeibp.co.jp/article/NEWS/20140318/544245/?ST=litegoogle 2011 http://m.searchina.ne.jp/news/disp.cgi?y=2011&d=1104&f=it_1104_016.shtmlfacebook 2010 http://mw.nikkei.com/sp/#!/article/DGXNASGM3001F_Q0A231C1FF1000/