From Wikipedia, the free encyclopedia Mai Matsumuro (ę¾å®¤ éŗ»č”£, 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 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;