Ushi-oni
Bovine-headed yōkai of western Japanese folklore.
The ushi-oni (牛鬼), or gyūki, is a type of yōkai found in the folklore of western Japan. While multiple versions exist, most share the image of a monster with an ox’s head. These creatures typically haunt beaches and attack anyone walking along the shore.
Their appearance changes depending on the region, but they are always vicious and cruel. Commonly, an ushi-oni has an ox’s head with sharp, upward-curving horns, wicked fangs, and a slender tongue. It spits poison and delights in killing and eating humans. Its body is often shown as spider-like, with six legs, each ending in a long, single claw. In other accounts, it has an ox’s head on an oni’s torso. Some legends say it appears at mountain temple gates wearing human clothes, or flies with insect wings. Rarer versions reverse the features, giving it an oni’s head and an ox’s body.
Ushi-oni are said to appear on beaches, in mountains, forests, rivers, swamps, and lakes. They often lurk in stream pools, and in places like the Kinki region and Shikoku, many locations bear names such as “ushi-oni fuchi” (ushi-oni pool) or “ushi-oni taki” (ushi-oni waterfall). In Edo-period yōkai scrolls like the *Hyakkai Zukan*, they are usually drawn with a bovine head and a spider’s torso. The *Hyakki Yagyō Emaki* shows a similar image under the title “Tsuchigumo.”
In Mie Prefecture, the ushi-oni is said to bring curses. According to one story, an ushi-oni lived in the caves of Gokasho-ura, Minamiise. When the lord of Gokasho Castle, Aisu Shigeaki, shot it with a bow, his wife fell ill with an incurable disease due to the curse. Shigeaki then distanced himself from her and became infatuated with a dancer from the capital. This caused bad relations between the wife’s parents, the Kitabatake family, and the Aisu, ultimately ruining the Aisu.
In Wakayama Prefecture, an ushi-oni pool in Nishimuro District is said to connect to the sea at its bottom. When the water became dirty, people would say, “the ushi-oni is there.” Simply encountering it would cause illness. To save oneself, one could say opposites like “rocks flow, leaves sink, oxen neigh, and horses bellow.” The ushi-oni here has a catlike body, springy like a ball, with a tail over 3.3 meters long, so it walks silently. Another tale tells of an ushi-oni at a waterfall basin in the Wado River. If it licks a person’s shadow, that person gets a high fever and dies within
- type
- Yōkai (supernatural monster)
- region
- Western Japan (Mie, Wakayama, Okayama, San'in, Kōchi, Ehime prefectures)
- common features
- Ox head with sharp horns, fangs, slender tongue; often spider-like body with six legs and claws
- habitat
- Beaches, mountains, forests, rivers, swamps, lakes, stream pools
- known for
- Attacking and eating humans; spitting poison; shapeshifting; cursing victims
Lore & Background
Ushi-oni have brutal, savage personalities. Their appearance varies, mainly based on geographical location. They usually have an ox's head with sharp upward-curving horns, wicked fangs and a slender tongue. They spit poison and enjoy killing and eating humans. Their body is most commonly depicted as spider-like with six legs and long singular claws at the end of each appendage. In other descriptions, they have the head of an ox and an oni's torso. Certain legends claim that they appear in front of temple gates in the mountains wearing human clothing, or flying with the wings of an insect. Other ushi-oni have a reverse appearance, with an oni's head and an ox's body. They are said to appear in beaches, mountains, forests, rivers, swamps, and lakes, often in stream pools. In yōkai emaki of the Edo Period such as the Hyakkai Zukan, they are most often shown with the bovine head and a spider torso.
Reader's Guide
The ushi-oni is a significant figure in Japanese yōkai folklore, particularly in western Japan, where regional legends attribute to it both malevolent and occasionally helpful acts. In Mie Prefecture, an ushi-oni cursed a lord's wife after being shot, leading to the ruin of the Aisu clan. In Wakayama Prefecture, encountering an ushi-oni could cause illness or death, though offering alcohol at New Year's could appease it; one tale describes an ushi-oni that saved a human but melted away in the process. In Okayama Prefecture, an eight-headed ox-shaped monster called Jinrinki attacked Empress Jingū and later became islands. In Kōchi Prefecture, an ushi-oni was slain by a warrior, inspiring a festival called the Momotesai. In Ehime Prefecture, a yamabushi subdued an ushi-oni with a conch and mantra. The ushi-oni also appears in coastal regions alongside nure-onna and iso-onna, often shapeshifting into a woman carrying a baby to trap victims. These varied legends illustrate the ushi-oni's role as a dangerous but regionally diverse yōkai, whose stories explain place names, natural features, and local customs.
Did You Know?
- In Wakayama Prefecture, an ushi-oni that saves a human must leave this world in exchange, and one such ushi-oni melted away while bleeding profusely.
- In Okayama Prefecture, the eight-headed ox-shaped monster Jinrinki was shot by Empress Jingū and its body parts became several islands.
- In Kōchi Prefecture, a festival called the Momotesai is said to originate from villagers imitating the slaying of an ushi-oni.
- In the San'in region, an ushi-oni can be identified even when shapeshifted because its reflection on the waterfront remains that of an ushi-oni.
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