KAT-TUN (Hepburn: katūn, sounding similar to "cartoon") is a Japanese boy band formed under Johnny & Associates (JE) in 2001 who releases records under their own label, J-One Records. The group's name is an acronym formed by the members' surname initials. Currently one of the most popular boy bands in Japan, all eight singles, three studio albums and six DVDs released by the group since their debut in 2006 have debuted at number one on the Oricon music and DVD charts.