The 5.6.7.8's first started performing as a quartet in Tokyo, and recruited guest performers during their Australian tour, once even utilizing a male member, "Eddie".
The 5.6.7.8’s comezaron actuando como un cuarteto en Tokío e foron recrutando moitos intérpretes invitados durante a súa xira por Australia, onde incluso recrutaron a un membro home, "Eddie".