Oiwa is one of the most famous Japanese ghost story in Japan, it is known as “Yotsuya Kaidan” and it tells the story of a woman who is poisoned by her unfaithful husband. Her disfigured ghost returns from the dead to exact revenge.
See more detail story

http://yokai.com/oiwa/
https://www.scaryforkids.com/oiwa/

Story originally was written in Edo period. Since then, many authors, writers are arranged story. Therefore, There are many variations and works (Movie, Novel, TV dorama, Animation, Rakugo, Kabuki).

Oiwa and her husband are real people. Couple actually got along well. She was a good wife wise mother, and very active for her husband’s success.