Yuko Nasaka (????, Nasako Yuko, born 1938) is a Japanese avant-garde artist who is known for her involvement with the Gutai Art Association. She was born in Konohana-ku, Osaka, Japan in 1938. Nasaka was the second daughter to parents, Yogashige Takeda and Matsue Takeda, who had six children.

Nasaka started to paint at the age of three. Her teacher hung one of her first pictures on the glass walls inside the school, which was of "a self-righting doll made out of celluloid". When Nasaka was six years old, her family moved to Takarazuka in Hyogo Prefecture. She began oil painting in her early teens while she attended Osaka Municipal Utashima Junior High School.

In 1953, Nasaka entered Osaka Prefectural Ichioka High School, and w...