The Kuji-Kiri are the Ninja's Nine Levels of Power. They are 1. Rin - Strength of mind and body. 2. Kyo - Direction of energy. 3. Toh - Harmony with the universe. 4. Sha - Healing of self and others. 5. Kai - Premonition of danger. 6. Jin - Knowing the thoughts of others. 7. Retsu - Mastery of time and space. 8. Zai - Control of the elements of nature. and 9. Zen - Enlightenment.
Shô Kosugi is an actual Ninpo practitioner and was also the movie's technical advisor and fight co-choreographer. Kosugi starred in numerous other 1980s ninja movies and appeared in each of the films in Golan-Globus' Cannon "Ninja" series but playing different characters.
The third and final of three "Ninja" movies in the Golan-Globus Cannon Ninja trilogy. The first and second films were Enter the Ninja (1981) and Revenge of the Ninja (1983). All three films were unrelated in terms of story. Cannon also went on to make American Ninja (1985) which spawned its own franchise which went to five movies.
Despite being the third and final entry in the Ninja trilogy, this film has nothing to do with the first two films Enter the Ninja (1981) or Revenge of the Ninja (1983), despite the fact that they all star Shô Kosugi (but playing a different character in each film).
Director Sam Firstenberg considered the film the be quite a failure for many reasons. The first being the fact that no fan of the first two Ninja films would buy Lucinda Dickey as a Ninja and a female hero. The second was the mishmash of Flashdance, The Exorcist and a regular Ninja movie that didn't gel at all. Lastly, the whole ninja concept would have to be reconceived and eventually they came up with American Ninja, a year later which was also directed by Firstenberg and starring Michael Dudikoff.
The third film in which Lucinda Dickey starred in for Cannon Films in 1984. She was also both Breakin' and Breakin' 2: Electric Boogaloo (which was also directed by Sam Firstenberg). Menahem Golan touted her as being his next breakout star and was affectionately dubbed as "Cannon's go to girl" that year.
In this final film for this trilogy, there have been different styled Ninja villains and good Ninjas in different uniform styles and fighting techniques. In Enter The Ninja, Hasegawa (played by Sho Kosgui) was an Evil Black Ninja while Cole (played by Franco Nero) was an honorable White Ninja. Hasegawa was a more traditional samurai warrior while Cole was an advanced student who respected the Ninja code. In Revenge of the Ninja, Brayden (played by Arthur Roberts and stuntman Steven Lambert) is an evil American Ninja using an Japanese silver devil mask dressed in sheer black and Cho (also played by Kosgui) also wore black but featuring the emblem of his family credo over his heart which is a swan in a circle. Brayden was as perfect an assassin as Cho due to his training in Japan which was not known to Cho personally as he played the rather tough but naive American, which made him alot deadlier in this sense along with the fact that he was a ruthless drug trafficker and Cho was more honorable and in keeping with the Ninja and family traditions on exacting revenge. In this film, the evil Black Ninja (played by David Chung) wears Grey with black covering his mouth as does the possessed Christie, when he commits his revenge through her and Yamada (again played by Kosgui) wears his traditional black ninja uniform without covering his face. The evil Black Ninja was claimed to be the deadliest of all ninjas due to the fact that he was involved with black magic which also explains why he was able to transfer his soul into Christie first via his sword and then completely take her over using her video game machine possessing her using the colored lights and swarms of images hitting her body.
When the film opens, the Black Ninja arrives in the cave to put on his uniform and look his weaponry by admiring his star shriken this repeats itself after Christie becomes possessed and takes the star shriken and admires it with her fingers as her weapon of choice.
The trivia items below may give away important plot points.
When the evil black ninja takes over Christie, you notice her demeanor and appearance change. Her hair displays a Grey hair streak, her eyes become slanted with eye liner reinforcing this and hardly ever talks except for the attempted exorcism scene where the black ninja reveals himself. She also becomes both physically aggressive and vicious as opposed to Christie's normal persona as a fun and exciting 80's girl.
In the hot tub scene, Christie is wearing a black swimsuit and a pearl ring on her hand which has a needle underneath it and her eyes are slanted meaning she has become the Black Ninja using her body to seduce and ultimately kill the cop and the two hookers.
When Christie finally becomes completely possessed by the Black Ninja's spirit, she is first hypnotized by the blinding light of the Bouncer video game and then it starts to reflect several different colors of bright warm lighting on her which consists of reds, yellows, and white along with different shapes. Early on you can see the laser image of the Black Ninja's spirit completely getting into Christie's body after she closes her eyes, to accept it and after the final wave, opening her eyes to see his sword circling around her until she joins with it and finally has become the Black Ninja completely.
When the Black Ninja's sword first emerges in Christie's place out of her closet, she takes it in her hands and starts to have the Black Ninja's memories completely transferred into her. During the process, her eyes start to take on his appearance and the blade starts to get hotter and hotter in her hand. It was the second step in her possession by the Black Ninja which finally stops when Secord, her boyfriend wakes up.