Biography
toutou is a Japanese pop duo consisting of:
Sayaka Nishimura(西村紗也香) - Born October 14th, 1989.
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Marika Nishimura(西村麻理香) - Born February 4th, 1991.
They are the actual sisters, Sayaka is an elder sister and Marika is a younger sister.
1st single: Hoshiuranai no Uta[星占いの歌](July 06,2005)
2nd single: Kokoro no Mondai/Onegai! Prime Minister[ココロの問題/お願い！プライムミニスター](November 16, 2005)
Biography text from Last.fm, available under CC BY-SA.