Additionally, there is a concept called 'sanjo takai' (in addition to this, there are kaijo takai, chichu takai, etc), which means that the spirits of the dead (ancestral spirit) return to the mountain.
また、死者の魂（祖霊）が山に帰る「山上他界」という考えもある（この他は海上他界、地中他界など）。