Diamond Ninja Force (1988)
A white ninja is battling a Dark Ninja gang because they want to take the land where they think their secret wealth was hidden after it was stolen many years earlier. Things get serious when the Dark Ninjas kill the white ninja’s wife because she refused to tell them his location. Standard Godfrey Ho crazyness with some black magic and zombies…
It´s an old Japanese ghost movie, with new Richard Harrison scenes added afterwords, some years later.