South Korea have claimed their first victory in the World Cup with a convincing 2-0 defeat of Poland in Busan.
Hwang Sun-Hong volleyed home Lee Eul-yong's cross from the left after 26 minutes and Yoo Sang-Chul added a second when his long range effort beat Jerzy Dudek, who could only help the ball on its way into the net early in the second half.
Fellow co-hosts Japan earned their first World Cup point after drawing 2-2 with Belgium in Saitama.
Peter van der Heyden equalised for the Belgians in the 75th minute after Japan had came from behind to lead 2-1 after strikes from Takayuki Suzuki and Arsenal's Junichi Inamoto.
Marc Wilmots had opened the scoring early in the second half with a spectacular overhead kick.
In Group C, China, making their World Cup debut, began their campaign with a disappointing 2-0 defeat to Costa Rica in Gwanju.
Rnald Gmez struck on the hour with a cool finish following good work from Manchester City's Paulo Wanchope.
Mauricio Wright added a crucial second four minutes later when he head home Gomez's cross.
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