Continuity: The color of the umbrella handle that Kanta offers Satsuki changes.
Continuity: Some of the whiskers on Mei's drawing of Totoro vanish in a wide view.
Continuity: When Mei and Satsuki are running back home from school because of the rain, Mei trips and there is mud on her skirt. After a few scenes, her skirt does not have the mud.
Revealing mistakes: When the father droves with his daughters on bike down a hill, on the road they drive are stones and parts of wood, but the bike doesn't shake.