Tradition: Japanese Mythology
Alternative Names: Hyakujō’s Wild Fox, Wild Fox Zen
Category: Fox
The Myth
Hyakujō Yako is a wild fox spirit whose story originates in a famous Zen Buddhist tale about the monk Hyakujō Huaihai. The spirit appears as an old man who regularly attends the monk’s sermons, always leaving when the other listeners depart. One day, however, the old man remains behind after everyone else has gone. When Hyakujō asks who he is, the stranger reveals that he is not human but a former head priest who lived on the mountain during the time of the ancient Buddha Kāśyapa.
The old man explains that, long ago, a young monk asked him whether someone who had attained enlightenment remained subject to the law of cause and effect. The priest answered that an enlightened person did not fall under cause and effect. Because of this incorrect answer, he was condemned to be reborn as a wild fox for five hundred lifetimes. Desperate to escape his animal existence, he begs Hyakujō to answer the same question. The monk replies that an enlightened person does not obscure cause and effect. Upon hearing this answer, the old man immediately attains enlightenment and is freed from his long punishment. He tells Hyakujō that his fox body lies in a cave behind the temple and asks for a funeral befitting a monk before disappearing.
Hyakujō later leads his disciples to the cave, where they discover the corpse of an ordinary wild fox. He arranges for the body to be cremated as he would that of a deceased monk. That evening, he explains the strange events to his disciples. When one asks what would have happened if the former priest had never made his original mistake, Hyakujō invites him closer. The disciple responds by striking his master across the cheek, prompting Hyakujō to laugh and declare that there is another red-bearded Daruma among them.
The story became associated with the idea of wild fox Zen, a term for the mistaken belief that one has attained enlightenment without truly understanding it. The former priest’s transformation into a fox illustrates the consequences of misunderstanding cause and effect, while his eventual liberation demonstrates the importance of genuine insight. His five hundred lifetimes as a wild fox end only when he finally understands the distinction between denying cause and effect and failing to obscure it.
Sources
“野狐 (Yakujō Yako).” 新版TYZ 妖怪図鑑 (New TYZ Yokai Encyclopedia). https://tyz-yokai.blog.jp/archives/1064835229.html