During the scene when the character Tomi Hirayama is lying on the floor, supposedly dead, the actress playing her can clearly be seen breathing.
(At around 1hr 45 mins) When the children are visiting their mother at home and leave the room to talk with the father in an adjoining room, just as they sit on the floor, the shadow of the boom-mic can be seen to drop into the scene and back out again, just over the son's head on the top right of the screen. This shadow is well into the frame against the edge of what appears to be a bookshelf and should not be considered a masking mistake of the projectionist.