[3] Higuchi made her debut in 1996, before she had finished high school, in Mizuiro Jidai, voicing the character of Takako Takahata.
[4] In 1998, Higuchi provided the voice of Princess Mimori in the series Kero Kero Chime, a story about Aoi, a schoolboy who is cursed by a wizard and told that if he wants to remove the curse he must find Mimori (the main female character in the 30-episode series).
[7] In the summer of 2004, Higuchi released the albums Favorite Shoes, the Azumanga Daioh Character CD Series 4: Tomo Takino and Azumanga Daiō Kyarakutā Shīdī Shirīzu 4: Takino Tomo which after its release on July 24, 2004 ranked 80th in Oricon singles charts.
[9] She voiced the character of Yūko Atoda in the 2005 series Ah My Buddha, playing another tomboy.
[10] Later in 2005, Higuchi voiced the character of Hibiki Watanuki in the TV Tokyo series Pani Poni Dash!, a parody which frequently references Japanese and American popular culture.