Revealing: When Ryuuichi gets the "fireball" at the end of the movie, the motion of the ball (Computer Generated) doesn't always mach Ryuuichi's hand motions.

Revealing: When the man raping the busboy is killed, in the first shot, you see blood starting to splatter onto the back of the busboy's neck/shirt, but when the camera cuts to closeup, there is significantly more blood on him.

Continuity: After the car crash, when Ryuuichi gets out of the car, when the shot changes, his coat is opened more and in a different position than the previous shot. Now the sides are curled rather than straight.

Revealing: When the man accidentally coats his hand in breading and cooks it in the boiling oil, you can tell his hand has not been damaged at all. The breading on the outside is just a little cooked, but his skin underneath seems perfect.

Deliberate "mistake": When Jojima's car is blown into the air, one of Ryuuichi's thugs throws a knife at it. When Jojima gets out after the car crashes to the ground, the knife is stuck in his stomach. This is physically impossible, as the knife would have to go through a large portion of metal to hit him there.

Factual error: When Ryuuichi shoots the man in the car with the shotgun, you see a single large glop of blood hit the windshield. From this range, however, the man's head would splatter all over, not just in the one direction as shown in the movie.