In that sense, all things in nature can be yorishiro, and it is said they originated in the worship of iwakura (large rocks where kami dwell) and himorogi (a temporarily erected sacred space or "altar" used as the locus of worship).
その意味では、「森羅万象が依り代となり、その始まりは磐座・神籬信仰ともいわれる。