Kim Junsu (Korean: 김준수, Japanese: ジュンス; born December 15, 1986; registered on January 1, 1987), also known by his stage name Xiah(pronounced "shee-ah") or Xia, is a South Korean singer, songwriter, and stage actor. Best known as a former member of South Korean boy band TVXQ and currently JYJ, he has branched out to act in musicals.
Junsu debuted in 2003 under SM Entertainment, one of the biggest record label and talent agency in South Korea. As a member of TVXQ, he has released four Korean albums, four Japanese albums, thirty Japanese singles and several Korean singles. He has also appeared on two televised shows with TVXQ, Banjun Theater and Vacation. In July 2009, Junsu and fellow TVXQ members Kim Jaejoong and Park Yoochun filed a lawsuit against SM Entertainment, arguing that their exclusive contracts were unilaterally disadvantageous towards the artists and should be invalidated. The Seoul Central District Court in October 2009 ruled in favor of the three and granted an injunction suspending their contracts. Junsu subsequently debuted as JYJ (formerly known as JUNSU/JEJUNG/YUCHUN in Japan). As a member of JYJ, he has released one English album, one Korean album, one Japanese and one Korean EPs. Junsu began his stage career in 2010 playing Wolfgang Mozart, the lead role in musical Mozart!. He has starred in three musicals since. In May 2012, he released his first full-length solo studio album, Tarantallegra and followed up the release of the album with a world tour.
Source : wikipedia