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The Yobuko was thought to live in the mountains, and whenever a traveler entered the mountains and raised their voice, it would mimic them and call back.
In the artwork of Shigeru Mizuki, the Yobuko is depicted as a young boy with one leg, a large face, and wearing a straw rain hat. In the Oki Islands he was called Yobukodori (呼子鳥 Calling child bird?) and was said to be a bird.