Tsugunaga Momoko (嗣永桃子) is a former J-pop idol and singer under Hello! Project. She joined as a member of Hello! Project Kids in 2002 and later debuted as a member of Berryz Koubou (Berryz工房) in 2004. She graduated from Berryz Koubou on March 3, 2015 in a joint graduation concert with the other members of the group. The same day, she officially became a member of Country Girls (カントリー・ガールズ) as the playing manager.