Kim Shin-wook has scored four goals and Tottenham forward Son Heung-min added two as South Korea thrashed Sri Lanka 8-0 in their qualifier for the 2022 World Cup.
Australia beat Nepal 5-0, China thrashed Guam 7-0, Japan eased past Mongolia 6-0 and Iran obliterated Cambodia 14-0 in other Asian World Cup qualifiers on Saturday.
South Korea's Kim, a Shanghai Shenhua striker, netted twice in each half while both of Son's goals came before the break, including a 45th-minute penalty in Gyeonggi.
Hwang Hee-chan and Kwon Chang-hoon also scored for South Korea, which is seeking a 10th successive World Cup appearance.
It was South Korea's second straight win in qualifying, putting it top of Group H, ahead of North Korea on goal difference.
In Canberra, the Socceroos attack showed it was starting to click under Graham Arnold after they thrashed Nepal 5-0, but the coach was left frustrated.
Australia, who are pushing for a fifth consecutive World Cup appearance, had all the possession and territory, creating countless chances but struggled to finish in Canberra against the team ranked 161st in the world.
Arnold admitted his side should have scored more goals but said he remained confident his attack was headed in the right direction.
In Tehran, thousands of Iranian women watched the national team beat Cambodia 14-0 in the first soccer match they've been allowed to freely attend in decades.
The match marked a decades-long push by Iranian women to be able to watch soccer matches, something hardliners in Iran's Shiite theocracy to this day still oppose.
China, trying to qualify for a second World Cup, won 7-0 against Guam while Japan defeated Mongolia 6-0 in Saitama to go top of Group F.
Only the top team from the eight groups and the four best second-place finishers progress to the next stage.
Australian Associated Press