Yōkai (妖怪, "strange apparition") are a class of supernatural entities and spirits in Japanese folklore. Yamamba are variations on the name of a Yōkai found in Japanese folklore. In Hokkaido, Shikoku, and the southern parts of Kyushu, there is also a Yamajijii (mountain old man), and the Yamauba would also appear together with a Yamawaro (mountain child), and here the Yamauba would be called "Yamahaha" (mountain mother) and the Yamajijii a "Yamachichi" (mountain father) - Wikipedia. AI video generation.