At fifteen years old, Changmin was the youngest member.The band, TVXQ, debuted on December 26, 2003 at a SBS showcase for Bo A and Britney Spears.TVXQ released their first Japanese studio album Heart, Mind and Seoul in March 2006, but it struggled in Japan's charts, selling only 20,000 copies in the first month of release. On January 16, 2008, a week before the release of TVXQ's third Japanese studio album T, the group released their first number-one song in Japan, "Purple Line".
M.'s 6th Annual Youth Competition, Changmin signed with the company.
In 2003, Changmin was put in a boy band with four other members, which included U-Know Yunho, Hero Jaejoong, Micky Yoochun, and Xiah Junsu.
'Beatles Code 2' this week boasted guests of TVXQ, making it a must-watch episode for fans of the group, especially since there were hilarious moments like Changmin opening up about his 'scandal' with his labelmate, hoobae, and fellow male idol, SHINee's Minho!
The MCs dug into Changmin's past and uncovered a 'scandal' involving the idol and Minho.
In July 2009, members Jaejoong, Yoochun, and Junsu attempted to split with their agency S. The three members formally left TVXQ in April 2010 and formed their own band, JYJ. During this time, Changmin considered retiring from music.