Under 'the boom of traditional Japanese instruments' that started from 1964 among the composers of contemporary western music, varieties of traditional Japanese instruments including Soh were introduced in contemporary western music.
具体的には1964年ごろより洋楽系の現代音楽の作曲家の間での「邦楽器ブーム」により、洋楽系現代音楽の中に箏を含む邦楽器が広く用いられるようになった。