Born in 1945, Koichiro Harada studied the violin, chamber music, and orchestral conducting at the Toho Gakuen School of Music in Tokyo and at the Julliard School under Hideo Saito, Kazuyoshi Akiyama, Dorothy DeLay, and Ivan Galamian. In 1969, he founded the Tokyo String Quartet, of which he was first violin for twelve years. He later taught at the Cleveland Institute of Music and at the Aspen Music Festival. In 1983, Koichiro Harada returned to Tokyo and founded a number of other chamber music ensembles, including NADA and the Mito Quartet. He has also become a well-known orchestral conductor and works regularly with ensembles such as the New Japan Philharmonic, the Osaka Philharmonic Orchestra, the Hiroshima Symphony Orchestra, the Sapporo Symphony Orchestra, the Kyoto Symphony Orchestra, and the Tokyo Philharmonic Orchestra. In parallel with his concert activities, Koichiro Harada teaches at the Toho Gakuen School of Music in Tokyo and serves regularly on the juries of a number of international competitions, including the Queen Elisabeth Competition and the Wieniawski and Paganini competitions; in 2005, he chaired the jury of the Long-Thibaud-Crespin Competition in Paris.