The term "ningyo" refers to a creature from Japanese folklore, often translated as "mermaid." Unlike the Western depiction of mermaids, ningyo are typically described as having a fish-like body and a human upper body. They are known for their beautiful singing voices and are believed to bring both good fortune and misfortune to those who encounter them. In Japanese mythology, ningyo are associated with various legends and stories. One famous tale involves a ningyo whose flesh grants immortality when consumed. This has led to a complex relationship between humans and ningyo, as they are both revered and feared, embodying the duality of nature and the sea, much like other mythical beings such as siren or selkie.