This index defines one of the primary instinctual domains of Japanese folklore. It documents beast-formed yōkai, monstrous animals, and mythical creatures whose appearances blur the boundary between animals, spirits, and supernatural beings.
The entities collected here embody primal fear, predatory instinct, transformation, and forces beyond human control. They reflect how Japanese folklore transforms natural threats, animal symbolism, and untamed impulses into mythic narratives.
This domain forms the instinctual pillar of Japanese folklore, linking animal spirits, monstrous beasts, and shapeshifting entities into a unified folkloric structure.