Sawaï started koto studies at the age of eight. She graduated from the Tokyo University of Fine Arts and Music after studying with the master Michio Miyagi, designer in the 1920s of the bass koto. Counting 17 strings instead of the traditional 13, the bass koto became her favorite instrument. She began to play professionally in 1978, already alongside her husband, himself a composer of renown although with closer ties to tradition. Her first musical partners included pianist Aki Takahashi and percussionist Sumire Yoshihara. She appeared at the Festival d'Automne in Paris, 1978 and made a few more European apparitions in the next few years. During the 1980s she slowly developed her energetic style.
At the turn of the 1990s, Sawaï began to get noticed by the American avant-garde community. She appeared two years in a row (1989-1990) at the Bang on a Can festival, premiering music by John Zorn, among others. Her arrangement for four bass kotos of John Cage's Three Dances won her international acclaim. For a while she became very active on the free improv front, playing regularly with bassist Tetsu Saitoh, Hideaki Kuribayashi (one of her students), and French saxophonist Michel Doneda. The untimely death of her husband in 1997 brought a hiatus to her career, but by the turn of the millennium she was back to performing and recording. ~ François Couture, Rovi