Revealing mistake: During the fight at the shrine, a woman throws a warrior on top of a pile of rocks, and the rocks squeeze down, revealing they're made of foam. When the warrior falls on the floor, the rocks reinflate back to their previous shape.
Factual error: When the bishop is told Navarre is back and the bishop from the balcony claps and orders for Cezar, the portico behind the servant has a sprinkler pipe running from the first column to the opposite wall. Kind of advanced for a medieval castle. (00:33:00)
Continuity mistake: After the train operator gets his head dunked in the toilet by Warden Rankin, the poor guy has to wipe his face with tissue. The tissue disappears and reappears between shots. (01:17:13)
Continuity mistake: At the ambush, a gunman shoots the left rear tyre. Next cut the tyre is undamaged.
Revealing mistake: You see Scott walking towards the shower and he says hi to Chubby while passing him, but if you look closely after that you can tell Scott's only wearing a mask and his shoulder is bare skin. (01:00:15)
Continuity mistake: When the two traitors ride away after seeing Hidetora at the top of the hill, Hidetora's left leg is exposed due to his kimono being blown by the wind. In the next shot of Hidetora, his left leg is suddenly covered. (01:41:15)