Oiwa is a famous figure in Japanese folklore, known primarily from the kabuki play titled "Yotsuya Kaidan." She is often depicted as a vengeful ghost, or yūrei, who seeks revenge on her unfaithful husband, Iemon. Oiwa's tragic story has made her a symbol of betrayal and the supernatural in Japanese culture. The tale of Oiwa has been adapted into various forms of media, including films and literature, highlighting themes of love, betrayal, and revenge. Her character is often associated with the Oiwa Shrine in Japan, where visitors pay respects to her spirit and seek protection from similar fates.