He is the main vocalist and the leader of Korean boy group 2PM. He was formerly known as Junsu, but October 17, 2012 he revealed through his personal Twitter account that, due to family matters, he would be changing his name to Minjun (민준), and that his stage name Jun K. would remain the same.
On October 7, 2011, Jun.K released his debut solo single Alive. Alive's official MV was uploaded to 2PM's official YouTube account on October 10, 2011. His solo single quickly rose up the charts to be no. 1 of Cyworld. He auditioned for both YG and JYP and got accepted into both, but he chose JYP in the end.