Ann Kiyomura-Hayashi (born August 22, 1955) is a former American professional tennis player. She is from San Mateo, California.
Kiyomura played on the WTA Tour from 1973 to 1984. She played in 11 US Opens, reaching the fourth round in 1978. In 1973, she won the Wimbledon junior singles title, beating Martina Navratilova. In 1975, she won the Wimbledon women's doubles title, playing with Kazuko Sawamatsu. She reached the final of the Australian Open women's doubles in 1980.
Kiyomura played in 1981 for the short-lived Oakland Breakers of World Team Tennis (WTT). Other WTT teams of hers included the San Francisco Golden Gaters (1975), Los Angeles Strings (1978 WTT Champions), Hawaii Leis (1974) and Indiana Loves (1976–1977). In 1976, she teamed with Ray Ruffels of the Loves to lead WTT in game-winning percentage in mixed doubles.
Her parents were both involved in tennis, with her mother once a highly-ranked player in Japan and her father a tennis instructor. Her son John Hayashi was a well-regarded high school player.
Grand Slam finals