She is a former member of the avex girl group With, with fellow gravure idols Chinatsu Wakatsuki, Iori, and Kana Hoshino.
While still in high school at the age of 16, in 2002 Takasugi along with Chinatsu Wakatsuk, Iori, and Kana Hoshino formed the gravure idol group With.
[citation needed] In 2006, Takasugi made her first live performance at "Rhythm Nation 2006" sponsored by Avex, playing a cover of Yoshiyuki Osawa's "Soshite Boku wa Tohō ni Kureru".
In 2007, Takasugi released her debut single, "Tabibito", which was used as the theme song of the film Saiyuki, inspired by Chinese folk tale Journey to the West.
[citation needed] After being invited to participate at "a-nation '07", where Takasaugi was able to perform and promote herself at several places across Japan, she released her second single, "Hyakurenka", which was used as the ending theme of the NTV programs The Sunday and Adult no Shikaku.