Selling over 300,000 copies, it earned a platinum certification from the RIAJ and Matsu was named Best New Artist of the Year at the 12th Japan Gold Disc Awards.
[3] In 1998 she starred in the Shunji Iwai short film April Story as Uzuki Nireno, a shy girl who leaves home to attend the University of Tokyo.
[5] Her second studio album, Ai no Tobira, was released on Arista Japan the same year; it peaked at number 3 on the Oricon chart, and was certified gold by the RIAJ.
In 2004 "Toki no Fune", co-written by Matsu and Akeboshi and produced by the latter,[7] was released as the first single from her seventh studio album (Bokura ga Ita).
After the disappointing performance of her ninth studio album (Time for Music) and its accompanying singles, Matsu's musical career saw a resurgence with "Let It Go" (which she performed for the Japanese version of the Disney animated film, Frozen);[9][10] the song peaked at number 2 on the Billboard Japan Hot 100, and was certified million by the RIAJ.