Ōnyūdō

Ōnyūdō is a yōkai told about in parts of Japan.

Their name has the meaning of "big monk," but depending on area, there are various legends where their actual appearance is that of an unclear shadow, simply a giant rather than a monk, among others. The ones that look like a monk (bōzu) are also called ōbōzu. In size, there are those that are about 2 meters tall, slightly larger than that of a human, to giants that about the size of a mountain.

There are many legends where ōnyūdō menace people and many legends where those who see one become ill. There are also stories where they are foxes (kitsune) or tanuki in disguise, or something that a stone pagoda shapeshifts into, but many of them are of unknown true identity.

In Azashiro, Takawagawara village, Myōzai District, Awa Province (now Ishii, Myōzai District, Tokushima Prefecture), by leaving rice in the water wheel of the creek, an ōnyūdō with a height two jō and eight shaku (about 8.5 meters) would appear, and is said to hull the rice for that person. However, by looking at how the ōnyūdō is hulling it, one would get menaced by it.

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