Japan U21 triumphed 3-1 over rivals South Korea U21 in a highly anticipated Asian derby at the World Championship U21 on August 31, 2025. This match lived up to its billing as a clash of styles, with Japan's speed and technique ultimately overcoming South Korea's power and blocking. South Korea started strongly, using their height to win a tight first set. Japan responded by increasing the tempo of their attacks, running complex combination plays that opened up seams in the Korean block. Japan's libero was sensational, keeping countless rallies alive with spectacular digs. As the match wore on, Japan's relentless pressure and superior ball control in long rallies wore down their opponents, allowing them to take the next three sets and claim a vital victory in the group stage.