The moon rabbit in folklore is a rabbit that lives on the Moon, based on pareidolia that identifies the markings of the Moon as a rabbit. The folklore originated in China, and then spread to other Asian cultures.[1] In East Asian folklore, it is seen pounding with a mortar and pestle, but the contents of the mortar differ among Chinese, Japanese, and Korean folklore. In Chinese folklore, it is often portrayed as a companion of the Moon goddess Chang'e, constantly pounding the elixir of life for her; but in Japanese and Korean versions, it is pounding the ingredients for rice cake. In some Chinese versions, the rabbit pounds medicine for the mortals.