After graduating from music school in 1990, she took an opportunity to visit Japan in 1991 and finally contracted with the ROAD&SKY Organization  in 1993. Origa has since participated in several projects with various artists in addition to the Radio Japan Series and being part of the chorus for the Kobe earthquake disaster charity single. Origa married Iranian producer Zhian Saedi in 1998. They met at a party where she was singing. She gave birth to a son, Alyosha, in 2000.
As of 2005, Origa has released seven solo albums, two mini-albums, and 3 singles. She gained popularity outside of Japan with the release of Ghost in the Shell: Stand Alone Complex and the subsequent original soundtracks, Ghost in the Shell: Stand Alone Complex O.S.T. and Ghost in the Shell: Stand Alone Complex O.S.T. 2. These were written by long-time friend and composer Yoko Kanno, and both the first season's theme song, Inner Universe (featuring boy soprano Ben Del Maestro) and the second season's theme song, Rise used Origa's vocals. Origa first performed with Kanno for ∀ Gundam, singing Gabriela Robin's "Moon" with the Gey's AX chorus.