Takeshi Okada's Japan became the first team to book their place after earning a hard-fought 1-0 victory against Uzbekistan in Tashkent. They qualified yesterday.
Shunji Okazaki grabbed the only goal of the game after nine minutes to book a fourth successive finals berth.
Takeshi Okada: "We played very well. I think we should continue playing this style in the remaining matches."
The Socceroos eased into the World Cup without so much as even conceding a goal in the six matches it took them to qualify. They also qualified yesterday.
A 0-0 draw against Qatar in Doha wrapped things up for Pim Verbeek's team after they picked up 14 points in Group A of the final Asian qualifying phase.
The South Koreans secured a seventh successive World Cup finals place thanks to a 2-0 victory over United Arab Emirates in Dubai. They qualified yesterday.
Park Chu-young and Ki Sung-yueng grabbed the goals as Huh Jung-Moo's outfit strolled to a place in Africa's first World Cup.