W (ダブルユー, daburuyū?), also written as Double You or Double U, was a J-pop duo associated with Hello! Project. Nozomi Tsuji and Ai Kago, former fourth generation members of Morning Musume, were in the group. History 2004 W's formation was announced not long after the "graduation" of Kago and Tsuji from Morning Musume was announced in early 2004. At the time, the duo—longtime best friends since they met at the auditions that landed them in Morning Musume in 2000—were simultaneously in both Morning Musume and one of its most popular subgroups (or side projects), Mini Moni.