 TVXQ released their debut single "Hug" in January 2004.Their first studio album "Tri-Angle" (2004) debuted at number one on the Monthly Albums Chart by the Music Industry Association of Korea (MIAK), starting a streak of number-one albums for the group in the country.Influenced by their label mate BoA, TVXQ crossed over to the Japanese music industry in 2005, and released their debut Japanese studio album "Heart, Mind and Soul" in March 2006.