Mami made her debut in 1985. She has appeared as a guest or regular in numerous television specials and series, and in four films. Television series include Mama-tachi ga Sensō o Hajimeta!! (1985) and the 1989 NHKTaiga DramaKasuga no Tsubone, in which she played Senhime. Another jidaigeki role was in Minami Machi Bugyō Jikenchō.
Her film appearances have included the 1986 production of Ōoku and Yoshiwara Enjō (1987).