Susumu Hirasawa (平沢進, Hirasawa Susumu, born April 1, 1954, registered on the following day) (nicknamed "Hirasawa" (ヒラサワ) and "Shishō" (師匠)) is a Japanese music artist and composer.
In 1965, he started playing guitar, inspired by The Ventures, and joined a band with "older people" the following year. In 1972, he enrolled at Tokyo Designer Gakuin College. From 1972 to 1978, he performed in his first band Mandrake, a progressive rock band influenced by King Crimson, Yes, Black Sabbath and Pink Floyd. In 1979 he formed a experimental/electronic rock band called P-Model, along with two former members of Mandrake and a fan of the band/close friend. They released a string of albums through the 1980s, and in 1989, Hirasawa began releasing solo work, while also continuing to work with the reactivated P-MODEL beginning in 1992. The P-MODEL project continued until 2000; in 2004 Hirasawa started a new unit known as KAKU P-MODEL, which is effectively a solo continuation of P-MODEL.