Kim Jun-su, known mononymously as Junsu or known under the stage name XIA is a South Korean singer, songwriter, dancer and stage actor. He is currently known as a member of JYJ, and was one of the original members of boy band TVXQ, where he was formerly known by the stage name Xiah Junsu. In November 2021, Kim formed his own agency PALMTREE ISLAND with he charges as CEO.

JYJ is a South Korean boy band formed in 2010 by Kim Junsu, Kim Jae-joong, and Park Yoo-chun, the three former members of TVXQ. Their group name is taken from the initial letters of each member's names. The group was formerly managed by C-JeS Entertainment in Korea.