On November 27, 2014, Matsu revealed on her official website that she was pregnant with her first child. Her daughter was born on March 30, 2015, and had 3466 grams. 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. Matsu worked with the producers. Her third album, Sakura no Ame, Itsuka was released at Universal Music.
