Female Ninjas Magic Chronicles 4: Rebel Forces at the Threshold (1994)
Original title: くノ一忍法帖 IV 忠臣蔵秘抄
Female Ninjas Magic Chronicles 4: Rebel Forces at the Threshold is a 1994 Japanese-language action movie directed by Masaru Tsushima, with a running time of 1h 19m. It stars Makiko Ueno, Toshihide Wakamatsu and Nanae Shindo.
The female ninjas have to stop an alliance from carrying out their dastardly deeds, which includes bizarre ninjitsu sex magic to aid them in their quest.