Joji Yuasa (Japanese: 湯浅譲二; born in 1929 in Koriyama, Japan) is a self-taught composer. He first became interested in music in his childhood. Yuasa made the acquaintance of Toru Takemitsu (composer), Kuniharu Akiyama (musicologist) and others while a pre-medical student at Keio University in Tokyo. He joined them in forming the "Jikken-kobo" (Experimental Workshop) in 1952, and turned to devote himself to music.

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