The Socceroos did the damage in the first half, with giant Karlsruhe striker Joshua Kennedy opening the scoring on 11 minutes and Everton midfielder Tim Cahill and Palermo attacker Mark Bresciano adding two more before the break.
Australia needed the victory having been drawn in Asia’s “group of death” along with Iraq and China, who drew 1-1 in Dubai later in the day.
In Seoul, Manchester United ace Park Ji-Sung got on the score sheet in the 70th minute as the region’s most successful World Cup side as South Korea undid hapless Turkmenistan 4-0.