The Peanuts

The Peanuts (ザ・ピーナッツ, Za Pīnattsu) were a Japanese vocal group consisting of twin sisters Emi (伊藤エミ, Itō Emi) and Yumi Itō (伊藤ユミ, Itō Yumi). They were born in Nagoya, Japan on April 1, 1941. As identical twins they had voices only slightly apart in timbre, which resulted in their singing together sounding like a solo artist utilizing double tracking or reverb.