My favorite thing is this idea that they somehow are able to silently stalk people despite being almost 100-foot tall skeletons, because no one looks up.
Gashadokuro aka the starving skeletons are the reanimated and combined bones of the victims of starvation. Up to a hundred feet tall, they are heralded by the sound of bells ringing in the ears of their victims. They reach down from above to capture people and bit their heads off. The Gashadokuro haunt the darkness after midnight.