Japan remained unbeaten and in first place with a straight-sets (26-24, 25-16, 25-15) victory over Belgium on the fourth day of play in the FIVB World Grand Prix Finals at Ariake Colosseum on Saturday night.

The win guarantees Japan, which has never medaled in the event which began in 1993, no worse than the silver medal.

Japan (4-0) will battle defending champion Brazil (3-1) for the gold medal in the final match on Sunday night when the six-team, round-robin tournament concludes.