Movie trailers for the film declared this picture to be "the first erotic martial arts thriller".
The music score is excerpted from the movie 'Shogun Assassin' (1980) which is an amalgam of Japanese movies from the first two 'Lone Wolf and Cub' series films. Interestingly, the music composer credited on each picture is a different person.
Bug spray was used to simulate mist in one scene.
The fight club arena of death venue seen in the movie was noticeably used for the film 'Enter the Ninja' (1981) which debuted around the same time.
Darby Hinton wasn't initially paid after the principal shooting of this movie in the Philippines was done. It wasn't until he came back to America and did a few additional scenes for the picture that he was finally paid for acting in it.