Hiroko has performed songs for the Sailor Moon anime. She has performed original songs, as well as several French covers. Some other works from other animes include Sally the Witch, Kirby!, etc. Hiroko also worked on the Super Sentai series, as singing the 2nd ending song of Denji Sentai Megaranger. Hiroko's career became famous on the 1980s to 1990s, and Hiroko still sings.