Kim Jun-su, known professionally as XIA, is a South Korean singer and musical actor under PALMTREE ISLAND. He is a member of the male duo JX. He is a former member of boy groups TVXQ! and JYJ. In 2010, he made his acting debut in the musical 'Mozart'. On May 26, 2010, he made his solo debut with the Japanese EP 'Xiah'. In 2021, he established his own company named PALMTREE ISLAND.