(C)AMUSE Inc.

In 2003, while in their third year of middle school, the girls moved to Tokyo. They released CDs through an independent recording label and gave live street performances in Tokyo's Akihabara district, which is known as a center of Japanese pop culture. In 2005 they made their major-label debut with the song "Linear Motor Girl."

The trio became a hot topic throughout Japan in 2007, when they appeared in a TV commercial for a campaign to promote recycling. The commercial's repeated broadcasts sparked a flood of inquiries about the group. Starting when they entered the performing arts school, the girls worked hard for eight years before they scored their big break. Then, in April 2008, they had their first number-one hit single on the weekly music chart.