The defending champions Russia maintained their unbeaten run by defeating Serbia 3-0 in pool E at Yoyogi Gymnasium in Tokyo.
In pool F at Nippon Gaishi Hall in Nagoya, Brazil overpowered Germany in straight sets. In the same stadium, the United States defeated Netherlands in three sets.
China had experienced ups and downs in the championship. On Tuesday, the Chinese rallied to crush Poland in straight sets, keeping their hopes of remaining in the tournament still alive.
The 25-21, 25-23, 25-18 improved the win-loss record of China, who are only in contention for the semifinals for positions 5-8 at best, to 2-4, equal with Poland who now has no chance of reaching the top four.
"It was a very important game for China, but we played really well as a team. Poland are a strong team. We watched the Poland- Russia game and it was played at a very high level. But we had a day off and plenty of time to prepare for this game," said Chinese coach Yu Juemin.
The game between Japan and South Korea was much anticipated because in the previous matches, the former was defeated by China while the latter beat the Chinese.
The first set was a tough one for both teams with the score tight all the way. But the Japanese rallied in the last few minutes to gain the upper hand over their opponents. They won it 25-22.
Japan almost dominated the following two sets and overpowered their opponents by considerable margins.
The coach of South Korea Park Sam-Ryong said the game was disappointing. The loss was partly due to the careless mistakes made by the players, he added.