is a former Japanese singer, actress, and radio personality. Tsugunaga joined Hello! Project as a member of Hello! Project Kids at the age of 10 and later became part of the girl groups Berryz Kobo and Buono! Following Berryz Kobo's hiatus, she became the playing manager of Country Girls. In 2017, Tsugunaga retired from entertainment to become a kindergarten teacher. Career 2002-2004: Hello! Project Kids and ZYX In 2002, Tsugunaga auditioned for Hello! Project Kids with the song "Koi wo Shicchaimashita!" by Tanpopo. Her audition tape was aired on Morning Musume's variety show Hello! Morning. She was placed in the group with 14 other girls. In the same year, she starred in the movie Koinu Dan no Monogatari as the main character, Mao Morishita. In 2003, Tsugunaga appeared in the music video for Miki Fujimoto's "Boogie Train '03." She also became a member of the subgroup ZYX along with Mari Yaguchi from Morning Musume, Erika Umeda, Maimi Yajima, Saki Shimizu, and Megumi Murakami. They released their debut single, "Iku ZYX! Fly High" on August 6, 2003, followed by "Shiroi Tokyo" on December 10, 2003. Later, in 2004, she participated in singing "All for One & One for All!", a collaboration single released by all Hello! Project artists under the name "H.P. All Stars." 2004-2015: Berryz Kobo and Buono! In 2004, Tsugunaga was one of the eight girls from Hello! Project Kids were selected to form Berryz Kobo. Berryz Kobo debuted on March 3, 2004 with the single "Anata Nashi de wa Ikite Yukenai", and she was one of the lead singers of the group. From 2009 until 2014, Tsugunaga also hosted a radio show titled "Momoko Tsugunaga from Berryz Kobo's Pri-Pri-Princess." Continuing with her "Momochi" personality, Tsugunaga released a solo song and music video called "Momochi! Yurushite Nyan Taiso", which was released as a B-side to Berryz Kobo's 29th single, "Cha Cha Sing." In 2007, Tsugunaga also became part of the subgroup Buono! with Miyabi Natsuyaki and Airi Suzuki from Cute. The group formed to perform the opening and ending songs for the anime Shugo Chara! They released their first single, "Honto no Jibun", on October 31, 2007. After the show's end, Buono continued on as a side project until its disbandment in 2017. 2015-2017: Country Girls and retirement In 2014, Berryz Kobo announced they would end activities the following year. After Berryz Kobo went on hiatus, Tsugunaga took on