Kazuko Sawamatsu (Japanese: 沢松和子, born January 5, 1951 in Nishinomiya) is a retired Japanese professional tennis player. Along with Ann Kiyomura, she is the first person of Asian descent to win a Grand Slam title, as well as being the first Asian national to do so.
She competed in a number of major LTA tournaments in the 1970s on the world circuit. At the 1975 Australian Open – Women's Singles, she reached the quarter finals, as well as reaching the quarterfinals of the French Open and U.S. Open the same year. She also reached the semi-finals of the Australian Open in 1973, and won the 1975 Wimbledon ladies doubles title with partner Ann Kiyomura.