Sato was born in Japan on 9 April 1909. At the age of 107, she was still good at calligraphy. In September 2019, she was reported as the second-oldest living person in Akita Prefecture, after Miyo Hatakeyama. In September 2020, she was reported as the oldest living person in Akita Prefecture.
Sato currently lives in Daisen, Akita Prefecture, Japan at the age of 111 years, 287 days.