Lia (りあ) is a J-pop singer (born Dec. 20) who is best known for her work in the anime series AIR, with songs such as Tori no Uta (鳥の詩) and Farewell song.

Her music has also been featured in several games, such as Tomoyo After ~It's a Wonderful Life~ (智代アフター ~It's a Wonderful Life~); Beatmania IIDX, and the Japanese version of RFOnline.

Lia started out with I've Sound, appearing on I've Girls Compilation vol. 2 「verge」with 鳥の詩 -short ver.- She then released her first single with I've, SHIFT -sedai no mukou- (SHIFT -世代の向こう-). After this she released her final song with I've, Disintegration, on the compilation of the same name.

During the two year transition to her current label, Queen's Label, she has been featured on several happy hardcore and trance compilation. The enigmatic LIA albums, are examples of this. Her debut solo album on Queen's Label is the album prismatic. Since then she has released three more albums: Colors of Life, gift, and dearly. Colors of Life and gift show yet another side of Lia: classical, thanks to composer Hitoshi Sakimoto (崎元仁).

In 2007, Lia released a compilation box set titled 'Lia & LIA COLLECTION ALBUM-Special Limited BOX-'. The box set includes 3 volumes: Vol.1-「Diamond Days」, Vol.2-「Crystal Voice」 and Vol.3-「SPECTRUM RAYS」.

Both 「Diamond Days」 and 「Crystal Voice」 contain most of Lia's works from I've Sound (Light Colors, Tori no Uta, Farewell Song, etc.) as well as other songs, whilst 「SPECTRUM RAYS」 consists of her trance style, including remixes of songs from the previous volumes, such as Tori no Uta.