 Impressed with Tani, Watanabe, considered one of the "Pillars of Pink," cast Tani in her first leading role for his next film, "Bed of Violent Desires" (1967).Typical of the sex-thriller "pink films" made by Koei studio in the years before Nikkatsu took over the genre in the 1970s, in this film, Tani plays the role of a daughter who seeks bloody revenge against her mother and her lover after they kill Tani's father for his money.Tani's first experience with an S&M film was in one episode of the omnibus film "Memoirs Of A Modern Female Doctor" (1967), and her first full-fledged S&M leading role was in director Masanao Sakao's "Cruel Map of Women's Bodies" (1967), in which she plays a prostitute who repeatedly escapes from, and then captured and tortured by the "yakuza".