This index defines one of the primary liminal domains of Japanese folklore. It documents spirits, ghosts, and boundary beings associated with death, memory, and the spaces between worlds where the living and the departed intersect.
The entities collected here exist between states — neither fully alive nor fully gone — and often embody unresolved emotion, social taboo, ritual boundary, and ancestral memory. They reveal how Japanese folklore encodes grief, fear, and transition into supernatural form.
This domain forms the liminal pillar of Japanese folklore, linking ancestral spirits, boundary ghosts, and death-related beings into a unified folkloric structure.