Sawa was born in Sendai, Miyagi Prefecture, in 1903. In 1919 she joined the young girl's theater group of Takarazuka under the stage name of Izumi Ranko.

After passing through Shochiku Kamata, Sawa joined Nikkatsu Mukojima in 1923. In 1924 she moved to Teikoku Cinema's Ashiya Studios, where she became a leading actress. She met with great success for her performance in Hoshi wa Midaretobu, before going on to feature in Renbo Jigoku (Love's Hell).