Hideko Fukushima ( 福島秀子, Fukushima Hideko; 1927 – July 2, 1997), born Aiko Fukushima, was a Japanese avant-garde painter born in the Nogizaka neighborhood of Tokyo. She was known as both a founding member of the Tokyo-based postwar avant-garde artist collective Jikken Kōbō and as a talented painter infamously recruited into Art Informel circles by the critic Michel Tapié during his 1957 trip to Japan. As a member of Jikken Kōbō she not only participated in art exhibitions, but also designed visuals for slide shows and costumes and set pieces for dances, theatrical performances, and recitals. She contributed to the postwar push that challenged both the boundaries between media and the nature of artistic collaboration, culminating in the intermedia experiments of Expo '70.