Ninja Vs. Ninja on VHS. Starring Hung Gai Chan, Kwan Cheung, Norman Chu. Directed by Nick Cheung. 1987.
From the box:
Bitter Rivals Fight To The Bitter End.
An international cast is featured in this wacky Ninja saga, as an evil drug baron hires a Ninja sect to wipe out a cure for heroin addiction. It’s up to a secret police agent who is also an undercover Ninja to fight the bad guys! Featuring Ninjas of all races and the legendary ‘Five Elements’ Ninja, NINJA VS. NINJA is a must-see for Ninja and kung fu fans!
DVD Upgrade: Ninja vs. Ninja