TRANSLATION: many-eyed muraji (a hereditary title used in ancient Japan)
APPEARANCE: The paper sliding doors and windows, called shōji, found in Japanese houses can be easily damaged, and if not properly taken care of can become riddled with holes. When these shōji have gone a very long time without repair, ghostly eyes can begin to pop out of the holes, watching all that goes on inside of the house.
BEHAVIOR: Mokumokuren are harmless, but incredibly creepy. They often work in concert with other tsukumogami, though, and are usually a sign of a greater infestation of yokai.