Mujina (貉)

Mujina are folkloric manifestations arising from certain real animals—historically the Japanese badger and in some regions the Japanese raccoon dog—whose folkloric aspect is a spirit or animating force that acquires supernatural faculties such as shapeshifting and producing phantom lights. Early literary references (e.g., citations in classical chronicles such as the Nihon Shoki) describe animal-to-human song and transformation, and later regional folktales elaborate a repertoire of tests, pranks, and reciprocal interactions with humans.

In natural form described as a raccoon-faced creature with the main body like a Japanese badger; regional use of the term has overlapped with raccoon dogs (tanuki), producing confusion in identification. As a shapeshifter the mujina adopts many human and object guises in stories: common human forms include a woman used to seduce, a black-garbed Buddhist priest (tanuki-bôzu), a one-eyed hag, or officials; non-human guises include fence posts, stones, trees, and will-o’-the-wisp lights. Some tales—most famously in Lafcadio Hearn’s retelling—associate mujina with faceless human apparitions (noppera-bō), a conflation found in particular literary and regional variants rather than a universal trait.

Primary capacities in the tradition are shapeshifting and illusion, enabling convincing human or object disguises though transformations are variable in reliability (accounts note slight luminescence or unraveling if the creature sleeps). Mujina are tricksters that test and deceive humans, sometimes luring or disorienting victims, while other tales emphasize gratitude and protective acts toward those who showed them kindness. Additional folkloric behaviors include producing phantom lights (tanuki-bi / ghost-fire), singing or taking human form to sing, and folkloric hyperboles of inflating body parts (e.g., inflated belly or scrotum) used in comic or trickster narratives to perform musical or buffoonish feats.