[4] In 1964, he went on to become a freelancer and recording artist, and had several popular songs in Japan such as "Ju", "Oyaji no Umi", and "Yosaku".
[3] He also played shakuhachi on Hibari Misora's Japan Record Award-winning song "Soft".
[2] Muraoka recorded and privately released his live album Osorezan, which was dedicated to Mount Osore, in April 1970.
His next album, Bamboo, was released later that year as part of the "New Emotional Work Series" for United Artists, and later reissued in 2019 through Mr Bongo Records.
[2][8][9] Other instruments used in Muraoka's music, specifically with his group the New Dimensions, were electric bass, organ, shō, shinobue, koto, shamisen, and taiko.