Ushiroyubi Sasaregumi

Ushiroyubi Sasaregumi was a female Japanese pop music duo consisting of Yukiko Iwai and Mamiko Takai, formed in 1985. In parallel to their membership in this duo, Iwai and Takai were at the same time members of Onyanko Club, a large pop group widely seen as a precursor to groups such as Morning Musume and AKB48.