Yamauba

The Yamauba arises from the historical practice of ubasute, where old women were abandoned in remote mountains during premodern famines in Japan's Tōhoku. Instead of perishing, the mortal woman is absorbed by the mountain kami and transformed into an anthropophagous yōkai. Regional variants describe her as the soul of a jealous or betrayed woman who withdrew to the mountain and upon death became yamauba. Her ambiguous nature allows both devouring travelers and benevolently raising the hero Kintarō on Mount Ashigara, according to Heian period tales. This duality reflects the boundary between the domestic and the monstrous in the folklore of Iwate, Akita and Aomori.

The Yamauba possesses shape-shifting between a hospitable daytime form of a hunched old woman with disheveled white hair, tattered kimono and soft voice offering hot soup, and a revealed nocturnal form with a vertical mouth from crown to chin showing inner teeth, empty eyes and serpentine prehensile hair. She controls forest paths to disorient victims, mimics loved voices, knows medicinal herbs and poisons, and enjoys centuries-long longevity. Her strength lies in deception rather than direct combat, with weaknesses to Buddhist sutras and dependence on her territorial hut in the forests of Mount Ashigara and Tōno.

Key symbols of the Yamauba include prehensile white hair, tattered kimono, revealed vertical mouth, isolated straw hut and broken zōri sandals, representing false hospitality and hidden danger. She relates as an elderly female variant of the generic oni and as a cross-cultural archetype with the elder gumiho and mountain huli-jing. In children's tales she acts as adoptive mother of Kintarō, while in 15th-century nō theater by Konparu Zenchiku she embodies the psychological boundary between refuge and devouring. Her geography spans Mount Ashigara, Tōno in Iwate and mountains of Akita and Aomori, documented by Yanagita Kunio.