Rie Tomosaka (ともさか りえ, Tomosaka Rie?) is a Japanese actress and pop star from Mitaka-shi, Tokyo, born on October 12, 1979 in Nagano-shi, Nagano. She works for Itoh Company. From 1996 to 1997, she has also released music under the name Eri Sakatomo (さかともえり, Sakatomo Eri?).
Her father is a beautician. In 1998, she majored in International Culture at Teikyo University, later dropping out. In 1999, she confessed that she had an eating disorder. When she began to appear on television, her female classmates came to ignore her suddenly. In high school, her national popularity rose, causing her stress that resulted in anorexia nervosa and bulimia nervosa.