As yorishiro that occur in nature, boulders and mountains (like holy Mt. Fuji) as well as seas and rivers are both places that the gods come to dwell and barriers between the spirit realm and the current (physical) world, and the "gi" from himorogi also means "fence", much as iwakura can also be called "iwasaka" (where "saka" means "border"); all these terms express the idea of the spritual boundary around a Shinto shrine.
自然に存在する依り代としての岩や山（霊峰富士山）・海や川などは、神の宿る場所でもあるが、常世と現世との端境であり、神籬の籬は垣という意味で境であり、磐座は磐境ともいい、神域の境界を示すものである。