Iemon

Iemon was a legendary Samurai and the main villain of the "Oiwa" legend, a classic Japanese ghost story (like many such tales it involves a tragic woman and a hateful consort, though even by the standards of Ancient Japan Iemon stands out as a particularly brutal example of said consort).

History
he was married to Oiwa but was a thief and waster, the marriage was inhappy and Oiwa decided to return to her family home to escape it, Iemon followed but was stopped by her father, who demanded Iemon divorce his daughter due to his misdeeds, instead Iemon murdered him and lied to Oiwa that a stranger killed her father, begging her to reconcile and promising to avenger her father's murder (she did so).

later Oiwa became pregnant with Iemon's son but they had little money and Oiwa grew sick after giving birth, Iemon grew resentful of his wife and conspired with a rich doctor to poison Oiwa so the samurai could marry Oume (the doctor's daughter): instead of killing her the poison disfigured her and Iemon grew to hate his wife even more, he decided to divorce her but needed a reason to do so under law so hired a friend to rape her so he could claim infidelity : the attempt failed when his friend saw her disfigurement and refused to do so, Oiwa then learned of her disfigurement and killed herself in grief, cursing Iemon as she died.

her body was discovered by Iemon's servant but instead of being sad by her death Iemon was overjoyed, the servant was obviously suspicious of this so Iemon murdered his servant : nailing both the servant and Oiwa's bodies to a door which he tossed in a river and made a lie that the servant and Oiwa had been sleeping together.

Iemon proceeded to marry Oume but soon became the "victim" of Oiwa's vengeful ghost, who drove him to kill his new wife and her father before driving him into the wilderness where he went insane.