Continuity mistake: In the scene where the witch gives Mika the dagger to kill herself with, the witch stabs it into the floor. When the witch leaves the dagger is lying on the floor. When Mika goes to grab the dagger it is stuck in the floor again. (01:15:20)
Continuity mistake: In the scene where the 47 ronin are granted a proper samurai's death, the shogun first has the black strap of his headpiece under his lip, then under his chin and then under his lip again. (01:41:00 - 01:42:40)