Three-time champions Pohang Steelers made an immediate mark on this year's ACL Champions League with a stirring 3-0 win at 2008 winners Gamba Osaka.
Kim Tae-Su opened the scoring with a 19th minute header and it was 2-0 moments later when Gamba goalkeeper Yosuke Fujigaya's attempted clearance deflected back off Zoran Rendulic and in.
Derek Asamoah completed a dream start to the group stage for Pohang with their third on 79 minutes at the Expo70 Stadium.
Adelaide United, who lost the 2008 final to Gamba, opened with a morale-boosting 2-1 win at Uzbekistan champions Bunyodkor in Tashkent. The Reds have endured a terrible A-League campaign but Nigel Boogard netted in the 11th-minute before fellow defender Antony Golec finished a fine counter attack. Kamoliddin Murzoev grabbed a injury-time consolation for the hosts.
It was a forgettable night for Adelaide's Australian rivals, the Brisbane Roar, as they were stunned 2-0 at home to competition debutants FC Tokyo. The Japanese side were rewarded for their dominance when Yazawa Tatsuya turned in the opener in first-half injury-time.
New signing Hasegawa Ariajasuru then had a simple tap-in, after Roar goalkeeper Michael Theoklitos could only parry Hanyu Naotake's curling shot, to seal victory on 55 minutes.
It was an unlikely win for Tokyo who have only just been promoted to the J-League, they earned their ACL place by winning the Emperor's Cup, while the Roar have had designs on winning the competition following their all-conquering performances Down Under.
Ulsan Hyundai were also winners in Group F as they held off Chinese giants Beijing Guoan 2-1. Kim Shin-Wook and Koh Seul-Ki set up the win despite Piao Cheng claiming a goal back for Beijing.