The 23-year-old joined the Bluebirds from Japanese club Cerezo Osaka in the summer, and has since made 13 appearances, scoring his first goal for the club in Friday's 4-1 win at Blackburn.
The Korean international picked up a bronze medal at the London 2012 Olympics, and is now setting his sights on even greater success.
He told Wales Online: "My first ambition is to play for Cardiff in the Premier League.
"But if I look further forward, my personal ambition would be to become the best Asian player in European football.
"That's a long way off and I understand that, but I would love to achieve that with Cardiff.
"I am ambitious and want to prove to everybody I am worth having at Cardiff."