Enter the Ninja (1981)

Director: Menahem Golan
Cast: Alex Courtney, Christopher George, Constantine Gregory, Franco Nero, Shô Kosugi, Susan George, Will Hare, Zachi Noy

Synopsis:

After completing his training of ninjutsu within Japan, an American Angolan Bush War veteran by the name of Cole visits his war buddy Frank Landers and his newly wed wife Mary Ann Landers, who are the owners of a large piece of farming land in the Philippines. Cole soon finds that the Landers are being repeatedly harassed by a CEO named Charles Venarius.