 "Duty" is Hamasaki's first studio album inside the 2000 decade, and her third consecutive studio album to be fully produced by Japanese musician and businessman Max Matsuura.The album's composing and arrangement was handled by several music collaborators, such as Ken Harada, Kazuhito Kikuchi, Dai Nagao, HΛL, among many others.Hamasaki contributed to the album as the primary and background vocalist, and songwriter to every song.