a Oborogurum is a strange spirit from Japanese folklore that takes the form of a large ox-cart with a frightening human face on it.
The spirit is not particularly harmful to humans but is anchored to the world between the living and dead due to lingering anger of ancient ox-cart owners who were denied a preferred spot during a period when cart spaces were hotly fought over.
As a result, the unhappy spirit of these ox-cart owners become a unique form of Tsukumogami in death, forever attached to their prized cart and moving across the world during the hours of night.