Tradition / Region: Japanese Mythology
Alternative names: Gyūki, Goki
Category: Spider, Cow
The Myth
The Ushioni is a terrifying yōkai that usually appears as a monstrous ox-like creature, although its appearance varies greatly between regions. Some traditions describe it as a giant ox, while others portray it with the face of an oni and the body of a huge spider, or as a two-legged beast with wing-like membranes. It is a violent predator feared for attacking both humans and animals.
The Ushioni is most commonly associated with dangerous places near water, including deep pools, rivers, waterfalls, marshes, and the seashore. Numerous locations throughout Japan bear names such as Ushioni Pool or Ushioni Waterfall, reflecting the belief that these monsters once haunted them.
Along the coasts of western Japan, the Ushioni often works together with other sea yōkai such as the Nure-onna and Iso-onna. It may first appear as a beautiful woman carrying a baby and ask a traveler to hold the child. As soon as the victim accepts, the infant becomes impossibly heavy, making escape impossible before the Ushioni reveals itself and attacks.
In the mountains of the Kumano region, the Ushioni was believed to kill without even touching its victims. It simply stared relentlessly at anyone it encountered until they gradually weakened, collapsed, and died. This mysterious affliction was known as having one’s shadow swallowed. People believed the only protection was to recite the strange charm: “Stones flow, leaves sink, cows neigh, and horses roar.”
Another tradition from Izumo says that during long periods of rain, a mysterious white light could cling to a person’s body. This phenomenon was called meeting a Ushioni and was believed to disappear only when exposed to fire.
One famous legend tells of an Ushioni that terrorized the region around Negoro-ji Temple in Kagawa Prefecture, killing people and livestock until it was finally slain by the master archer Yamada Kurōdo Takakiyo. The temple is said to preserve the monster’s horns as proof of its existence.
Across Japan, the Ushioni is remembered as one of the country’s most feared monsters—a savage ox demon that haunts lonely waters, deceives travelers, and brings death to anyone unfortunate enough to meet its gaze.
Sources
TYZ. (n.d.). Ushi Oni [牛鬼]. In 新版TYZ 妖怪図鑑. Retrieved June 28, 2026, from https://tyz-yokai.blog.jp/archives/1010653546.html