Jeju United is a South Korean professional football club based in Seogwipo, South Korea, who currently play in the K-League. Jeju United's first participation in Asian competition was during the 2011season, when they competed in the AFC Champions League, their first match was against Tianjin Teda of China PR.
Jeju United haven't won the Asia Champions League not yet, Jeju United's best performance is group stage of AFC Champions League in 2011. Their most recent participation in the competition was in 2011.
References
Jeju United FC in Asian football Wikipedia(Text) CC BY-SA