Career
She competed in the 100 m freestyle event at the 1932 Olympics, but was eliminated in the preliminaries. On August 29, 1933 Matsuzawa set a national record in the 50 m freestyle at 31.06 seconds that stood until August 21, 1954. In 1934 she became a high school teacher, and in 1936 a national swimming coach at the Berlin Olympics.
She returned to swimming in 1984, and between 1986 and 2000 competed at national and world masters championships.