While these sacred shrine forests, sacred trees, sacred mountains and Meoto Iwa are sacred realms or sacred bodies, they are also considered as boundaries between 'utsushiyo' (actual world) and 'tokoyo and tokoyo' (eternal night and eternal world).
これら鎮守の森や神木や霊峰や夫婦岩は神域や神体であると共に、「現世」と「常夜・常世」の端境と考えられていいる。