The South Korean group was formed by S.M. Entertainment in 2003. TVXQ began as a five-member boy band composed of members U-Know Yunho, Max Changmin, Hero Jaejoong, Micky Yoochun, and Xiah Junsu. They were immediately launched to mainstream recognition following the release of their first physical single Hug in 2004. Their first studio albums Tri-Angle (2004) and Rising Sun (2005) were both top sellers, pushing the band's popularity beyond Korea. Under Avex, TVXQ entered the Japanese market with their first Japanese album Heart, Mind and Soul (2006).