Tokyo, Japan, November 2, 2010 - Host team Japan remained undefeated in the FIVB 2010 Women’s Volleyball World Championship on Tuesday with a straight-sets win (25-9, 25-13, 25-8) over Costa Rica in Pool A action. Costa Rica (1-3) now faces a must win match against Peru on Wednesday to see who is the fourth team from Pool A to advance to the second round.