She hosted the 47th NHK Kōhaku Uta Gassen and debuted with the single "Ashita, Haru ga Kitara".
The single contained a cover of Akeboshi's "White Reply" previously recorded on her sixth album, Harvest Songs.
Matsu won the Best Actress of the Year of the 29th Hochi Film Award and the 28th Japan Academy Prize at the same time for The Hidden Blade.
In her album Cherish You, the song "Ashita Haru ga Kitara" was redone to combine her voice on her youth.
[5] On February 9, 2020, Matsu was called to join Idina Menzel, Aurora and eight more of Elsa's international dubbers to perform the song “Into the Unknown” at the 92nd Academy Awards.
Every international performer sang one line of the song in a different languages, including Maria Lucia Rosenberg, Willemijn Verkaik, Carmen Sarahí, Lisa Stokke, Katarzyna Łaska, Anna Buturlina, Gisela and Wichayanee Pearklin.