Takehisa Kosugi (小杉武久) was a Japanese composer and violinist who began his career in Tokyo in the 1960s and worked across experimental, avant-garde and electronic music. Associated with the Fluxus movement and with improvising collectives such as Taj Mahal Travellers, his work ranged from electroacoustic composition and electronic experimentation to extended-violin techniques and site-specific performance, intersecting with broader international avant-garde currents.
