Hiroshi Hara graduated in 1957 from Tokyo University of the Arts (formed in 1949 by the merger of the Tokyo School of Fine Arts and the Tokyo Music School). Moving to France in 1961, Hara studied at the Conservatoire National Supérieur de Musique, Paris, returning to Japan in 1964. Between 1990 and 1998 he was professor at Nagasaki National University.

In 1968 the Seikei University Guitar Society requested Hiroshi Hara to write a trio for them, and it was at this point that the composer’s involvement in guitar composition began. He did not play the guitar but as the commission was for a trio Hara undertook the work, writing in a monophonic style using the guitar for both melody and harmony.