Yayoi Matsumoto

is a Japanese swimmer. At the 2012 Summer Olympics, she competed for the national team in the Women's 4 × 100 metre freestyle relay, finishing in 7th place in the final. She also competed in the women's 50m freestyle, finishing with a time of 25.73 seconds in 35th place in the heats, and the freestyle relay. At the 2016 Summer Olympics, she competed in the 50 m freestyle, finishing in 43rd, and was part of the Japanese women's freestyle team.