Wakan Sansai Zue
A satori is depicted in Toriyama Sekien's "Konjaku Gazu Zoku Hyakki", but since this was modeled after the yamako (玃) in the Wakan Sansai Zue and other works, and since it even said, "there are yamako (玃) deep in the mountains of Hida and Mino" in the text along with it, it is said that Toriyama Sekien gave it the name "satori" since they are able to read (satoru) people's minds. The yamako was an ape man from Chinese legends, but in the Wakan Sansai Zue, it was an animal that read people's minds in Hida and Mino, and since the character 玃 can also be pronounced "kaku", the character 覚 (also "kaku") was used as one that fit for a replacement, which was later misread as "satori", so there is the interpretation that this is what gave birth to the legend of "satori" as a different kind of yokai than the yamako. There is also the theory that satori are based on the yamabiko found in the Konjaku Gazu Zoku Hyakki and the Hyakkai Zukan and other collections, but according to the folklorist Kunio Yanagita, from his work "Yokai Dangi", the folklore that satori would read people's minds, and the legend that yamabiko would imitate people's voices have the same origin.