All the crying about Japan, dry your eyes. Its a game and they played to the rules knowing they had less yellow cards. They took a risk doing it, which could have backfired, but it didn't.
Teams time waste all the time - take the ball to the corner flags, waste time at goal kicks, waste time with subs during extra time, roll around on the floor and waste seconds by faking injuries etc etc which is all part of the game, even by the very best teams, yet Japan get the abuse? How's about blaming Senegal for being wasteful in the other games?