She was the top-ranked player in Japan in 1979 and was ranked as high as No. 89 in the world.[1] She reached the third round of the 1988 French Open[1] and also played in the Australian Open.[2] She lived in Tokyo. Yanagi reached 4 singles and 6 doubles finals. She has won 1 singles title and 2 doubles titles on the ITF.[3]
Masako Yanagi played in one singles and two doubles ITF Independent Tour finals in 1982.