The buruburu is the “ghost of fear” in Japanese folklore. The buruburu lurks about in forests and graveyards in the form of a shaking old man or woman, sometimes one-eyed. The buruburu attaches itself to the back of its victim, causing a chill to run up and down the spine. The victim then dies of fright. Variations of this ghost are the zokuzokugami and okubyohgami, which possess their victims and cause them to be too afraid to go anywhere.
:The Encyclopedia of Ghosts and Spirits– Written by Rosemary Ellen Guiley – September 1, 2007