Continuity: In the final fights with Raizo, Takeshi, and other ninjas, Raizo kills the ninjas and blood is shown. In subsequent shots of the whole setting during the fight, the blood disappears and reappears subsequently.
Continuity: In the scene where Mika is having lunch with Maslow in the park, the amount of Maslow's drink keeps changing between takes.
Continuity: In the final fight scene, Raizo finally kills Ozunu with a sword through the back. When viewed from the front there is blood everywhere, but when the movie switches to an overhead view to show Ozunu dropping to the floor, there is no blood or wound visible on his back.
Incorrectly regarded as goofs: In the hotel, Mika tells Raizo that she doesn't smoke. Later in the movie when Raizo is recovering on the bed, Mika is seen smoking. However, this due to her doing what Raizo had earlier done for her, masking her scent with smoke from a cigarette.
Revealing mistakes: When the German Police arrives at the hotel, the sirens sound like American sirens. However, German police cars have a completely different sound.