This index defines one of the primary wilderness domains of Japanese folklore. It documents yōkai and spiritual beings associated with mountains, forests, mountain passes, and remote paths — liminal landscapes where the human world and the otherworld are believed to intersect.
The entities collected here embody fear, protection, guidance, and warnings rooted in untamed nature, isolation, and environmental boundaries. They reflect how Japanese folklore encodes ecological anxiety, reverence, and survival knowledge into supernatural narratives.
This domain forms the wilderness pillar of Japanese folklore, linking sacred mountains, forest spirits, and dangerous passageways into a unified mythic structure.