Continuity mistake: Christie enters the temple on the hill. When she approaches the altar, the red cloth is draped over it in differently from before. Similar mistakes (although nowhere nearly as blatant) happen between cuts when Ninja Christie and Yamada fight in front of the corpse. A HUGE instance of the mistake though happens when the evil spirit migrates from Christie's body to its previous host, though; the body was fully covered by the red shroud, and then not at all. (01:17:40 - 01:19:35)
Continuity mistake: When Christine looks at Yamada before falling unconscious, the sword scabbard is right next to her at the bottom of the frame, but it's at greater distance in the previous shot and rest of the movie (like when her boyfriend wakes her up), except when the black ninja rises, when it's gone. (01:19:15)
Continuity mistake: When Yamada causes Christine to faint and release the evil spirit, her body lies on the floor at an ever-changing angle throughout the scene (her feet are pointing 4 o'clock initially, but when the Black Ninja becomes the Zombie Black Ninja they are at 6, and they are at 8 when Yamada looks at the possessed monks). (01:19:25)
Revealing mistake: Fight with the possessed monks; Sho Kosugi reluctantly kicks the first one, then he has two in front of him; fighting the leftmost one, he hits him with a great kick, but then his backhand is miles away from connecting. (01:21:15)
Revealing mistake: During the fight of the monks that happens on the double squared platform, part of spear gets chopped and flies around the set like it's made of the most flimsy material. (01:21:40)
Continuity mistake: When Yamada leaves the temple, the shadows on the matte painting long shot don't match at all the shadows on the closer angle of the stairs. (01:22:30)
Other mistake: During the movie it had been made clear that Christie would pick up bruises and black spots from the fights, and they wouldn't heal in minutes. However, Lucinda Dickey's face is spotless when Jordan Bennett finds her at the temple, and she had a big shiner and cuts during the earlier scene at her house. (01:23:20)
Revealing mistake: During the final earthquake, the camera shakes vigorously but not a single blade of grass or leaf moves in the slightest. (01:27:00)
Revealing mistake: When Sho Kosugi stabs the Zombie Green Black Ninja in the skull, the victim falls down replaced by a dummy. (01:28:25)
Other mistake: When the two caucasian heroes smile back at their new asian friend at the end of the movie, you can see that Lucinda Dickey's hair looks somewhat blacker and with a thicker front bang. She's wearing a wig, since it was a later reshoot, and she had already cut her hair short for her role in Breakin' (which was shot later despite ending up being released before this movie). (01:29:00)
Other mistake: Ron Foster appears in the end credits as "Jiminiz", but his name tag much more logically says "Jimenez." (01:29:50)
Other mistake: During the final fight, the Black Ninja (which confusingly enough is the one wearing green, and the ninja in black is the good guy) in some shots wears pale white cadaver makeup around the eyes, and in other does not. His fingers are also constantly of a healthy color.
