安倍なつみ (Abe Natsumi) was one of the first five members of Japanese pop group モーニング娘。 (Morning Musume) in 1997. She often took the lead in the group's songs, on occasion singing the entire lead vocal with the other girls acting as backup singers. In 2004, she graduated from the group to pursue a solo career. In 2003 Abe teamed up with 四角佳子 (Yosumi Keiko), a former member of 六文銭 (Rokumonsen), as a so-called "mother and daughter" duo and released a single to prepare her for her solo efforts.