Ann Kiyomura-Hayashi (born August 22, 1955) is a retired American professional tennis player.

[2] At age nine, Kiyomura won the San Mateo County Recreation Department's tennis tournament.

She continued to excel at tennis while attending Aragon High School in San Mateo.

[2] Kiyomura played in 1981 for the short-lived Oakland Breakers of World Team Tennis (WTT).

In 1976, she teamed with Ray Ruffels of the Loves to lead WTT in game-winning percentage in mixed doubles.