A Japanese musician, studied koto under Tadao Sawai, Kazue Sawai and Satomi Kurauchi, and graduated from the NHK Professional Training School for Traditional Musicians. Between 1989 and 1990, during her tenure as Visiting Professor of Music at Wesleyan University in Connecticut, U.S.A., she premiered numerous modern compositions for koto and came under the influence of maverick American composers such as John Cage, Conlon Nancarrow, and John Zorn. Her solo koto CD Shizuku was produced by Zorn and released on the Tzadik label in 1999. In 2001 she recorded "Yural" with her koto ensemble Paulownia Crush for the East Works label. Under the auspices of the Japan Foundation, Yagi toured Russia with this ensemble in the fall of 2004.