She runs the company S Inc.[2] During the 1990s, Hiromi Sato sang and played keyboard as part of the indies band Satyagraha.
[4][5] Sato made her solo singing debut in 2000 with the song "Shield", ending theme for the PC game Kanaria: Kono omoi o uta ni nosete by Front Wing.
[6] In October 2001 she released her first major debut album, Looking for sign, a collection of game theme songs she had performed.
[7] She had her first voice-acting role in the 2005 TV anime Sousei no Aquarion as Rena Rune.
In May 2007, Sato started her own company S Inc., a talent management and music production agency.