Kigurumi (キグルミ) is a famous J-pop duo from Japan who debuted in 2006 under Victor Entertainment.
Today, Miki and Kei were the active members of the band after Rena and Haruka left to become actresses.
At the age of 10½ years, Haruka was the youngest person in history to reach that high on the charts.
Rena remained in the band, but on July 13, 2007, a temporary band consisting of Rena and Michiko Shimizu, KIGURUMICHIKO, formed to perform the song "Hottottotto na Mainichi", which was used as the 5th anniversary ending for the show "Atashin'chi".
The band also sang the end song for the film, "Chiisana Hoshi No Youni".