 He first became interested in music while a pre medical student at Keio University, and in 1952 he joined a young artists’ group Jikken Kobo (Experimental Workshop, 1951 - 1957) in Tokyo, an organization for the exploration of new directions in the arts, including multimedia.Since then, Yuasa has written a wide range of compositions, including orchestral, choral and chamber music, music for theatre, and intermedia, electronic and computer music.His works have been commissioned by the Koussevitzky Music Foundation, Saarland Radio Symphony Orchestra, Helsinki Philharmonic Orchestra, Japan Philharmonic Orchestra, NHK Symphony Orchestra, Canada Council, Suntory Music Foundation, IRCAM and National Endowment for the Arts of the U.S.A.