Mai Matsumuro(松室 麻衣,Matsumuro Mai?, born June 10, 1983) is a Japanese pop singer and songwriter. She was one of the three original members and original lead singer of the J-pop band Dream also known as "Dream/DRM".
In July of 2002, she left the band to pursue a solo career. She is also known for writing the lyrics to the Japanese version of BoA's debut single, "ID; Peace B".
In 2006, Matsumuro launched a solo career, releasing digital singles.