 Preferring to continue starring in lower-budget films rather than playing supporting roles for Nikkatsu's leading Roman Porno actresses, she did not stay with Nikkatsu at this time.Even when Nikkatsu began asking Tani to work for their studio in major roles, she refused for years because Nikkatsu was reluctant to enter the S&M genre with its "Roman Porno" series.Feeling that S&M was her destiny, Tani consented to work at Nikkatsu only on the condition that her first film be based on Oniroku Dan's novel, "Flower and Snake".