"yasuyuki" (who is also a user on Twitter and here) has been ++'ed 2 times and --'ed 1 times by a total of 3 people.
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Operation Sign, User and Reason
++'ed by h_hiro
Tweet: @YaSuYuKi++
--'ed by maybowjing
Tweet: YaSuYuKi--
++'ed by skashu
Tweet: YaSuYuKi++