Makuragaeshi

There is no single unified origin tale in the sources; instead, the makuragaeshi motif appears in multiple local traditions. In some accounts the phenomenon is a home yōkai or small-child spirit (makura-kozō) or a prankster zashiki-warashi. In other narratives pillow-flipping is attributed to the spirit of a person who died in the room or to animal/tree spirits (tanuki, monkey, or a tree spirit in woodcutter tales). Temple contexts also preserve makuragaeshi motifs—hanging scrolls and named rooms associated with the effect—so some traditions treat the phenomenon as linked to particular temple objects or places rather than a single origin story.

Descriptions are variable and often absent. Many accounts simply report the action without a clear visual form. Where appearance is given, makuragaeshi are sometimes said to take the shape of a small child or a bōzu; a regional name makura-kozō (枕小僧) explicitly frames it as a childlike lad, with one account giving a height of about 3 shaku (~90 cm). The Edo-period Gazu Hyakki Yagyō depicts makuragaeshi iconographically as a miniature Niō (temple guardian statue). Other narratives treat the occurrence as invisible activity produced by a room's dead or by animals/forces rather than a visible being.

The core behaviour is nocturnal: coming to a sleeper's pillow and flipping it or changing the sleeper's orientation (head/feet). Regional variants add behaviors such as pressing on sleeping bodies (often described like sleep paralysis), lifting tatami mats, leaving small footprints, making sleep difficult, and in some tales producing paralysis or causing unconsciousness and death. Agents for these acts differ by region—prankster household spirits, room-bound dead, animal spirits, or tree spirits—and some temple-associated stories treat pillow-flipping as an omen linked to dreams or wishes granted.