She's best known as the vocalist behind IA, the Vocaloid that's become pretty iconic in electronic music circles. Beyond that, she's a singer signed to Key Sounds Label since 2001 and has collaborated repeatedly with the label's producer Jun Maeda on various projects. She's also affiliated with the group Veil.
Her background explains her fluency—she graduated from Berklee College of Music in Boston and spent some time living in Los Angeles before settling into her music career. That Western education and experience definitely shaped her approach to music.
Content compiled by AnimeList.moe from publicly available sources.
