In August 2003, three of the four original members of Beat Crusaders left the band, to eventually go on to form a new band "Anita Chili Peppers". This left behind only Tōru Hidaka who later recruited four new members, which make up the Beat Crusaders today. It is not known why the past members left. However, it doesn't seem like they left on bad terms, considering Hidaka included the masks of his former bandmates and his actions (he was crying) in the PV, "Sensation".
Later on down the road, their song "Hit in the USA" was used for the opening of the anime Beck: Mongolian Chop Squad, which moved the band out of the indie scene hitting Japanese music. Since then they have released several more albums including a cover album of American and British songs entitled "Music Crusaders." More recently their song "Tonight, Tonight, Tonight" was used as the fourth opening of the anime Bleach. In 2006, the band's music made its first American appearance as the opening theme song, "Hey x 2 Look x 2" (Aka "Hey Hey Look Look") to the Nicktoons animated series, Kappa Mikey. The single Winterlong is used as the opening of the anime Juushin Enbu (Hero Tales).
A full length CD "EPopMaking," was released on May 30, 2007, it contains 19 tracks, this was followed "Popdod" on June 4, 2008. It is rumored they picked said date due to Hidaka turning 40 the day after the release.