A Bakezori is one of the most well-known Tsukumogami, a kind of yokai created when a straw-sandal is abandoned or neglected and reaches the age of one hundred - at which point it will turn into a Bakezori and be capable of transforming into a spirit that often haunts a home by night, running around and singing.
Bakezori are relatively harmless creatures, but can potentially cause fear due to their alien appearance and behaviors. Their noisy haunting can be considered a type of poltergeist activity and is undesirable to anyone who many find themselves facing such a creature.