What is the rope on Totoros tree?
It is called Shimenawa, made of rice straw and paper ribbons. It signifies that this tree is sacred, part of the nature worship aspect of Shintoism (the native religion of Japan which has elements of nature and ancestor worship) and traditional Japanese cultural beliefs. When the father and the girls bow to the tree, he is literally thanking the spirit of the trees and the forest for protecting Mei. The Totoros are, in a sense, the physical embodiment of the spirit of the forest and trees. You can also see an old abandoned Shinto shrine under the camphor tree and a Torii (a sort of gate for a Shinto shrine) at the entrance to the hill.