Yuka Naoi (直井 由香, Naoi Yuka, born 17 March 1963) is a Japanese retired goalball player. She won a bronze medal at the 2004 Summer Paralympics with the Japanese team which also included her twin sister Yuki Naoi. Like Yuki, she has retinitis pigmentosa. She developed symptoms when she was 20, and began playing goalball in around 1997.