Kōsaka no Tamamo is a legendary figure from Japanese folklore, often depicted as a beautiful woman who is actually a shape-shifting fox. She is known for her cunning and magical abilities, which she uses to deceive humans. The story typically revolves around her transformation and the consequences of her actions, highlighting themes of trust and betrayal. In many versions of the tale, Kōsaka no Tamamo serves a nobleman, using her powers to bring prosperity. However, her true nature is eventually revealed, leading to her downfall. This narrative is part of the broader tradition of yōkai and folklore in Japan, which often features supernatural beings with complex relationships with humans.