|Book(s)||Konjaku Hyakki Shūi|
Kerakera onna are gigantic, horrid yokai found in red light districts, who get their name from the cackling sound of their laughter. They appear as an enormous, middle aged woman in colorful brothel kimonos, with thick make-up and slathered-on lipstick. They skulk around in alleyways and on empty roads, dancing, laughing, and mocking the profession that worked them to death. They are rarely seen outside of the pleasure district responsible for their creation.
When a man passes a lonely street or alley haunted by a kerakera onna, she unleashes a horrible, shrill cackle that can only be heard by him. A weak-hearted man faints right on the spot, but one who has the constitution to run away finds that no matter where he goes or who he turns to, the cackle echoes in his ears, and nobody but he can hear it. Eventually these men are driven insane by the incessant laughing – repayment for the lifetime of abuse the kerakera onna went through.
During the Edo period, the average lifespan of a prostitute was only 23 years, as the demands and hardships of such a life were too much for most to bear. Work hours were long and difficult, pay was low, and abuse was commonplace, both from clients and employers. Very few women made it to middle age, but like most long-lived things in Japan, those who did were said to become very powerful. When a prostitute died after serving in such a painful world for so long, her ghost could not pass quickly and easily on to the next life, these ghosts become the kerakera onna.
- Kerakera onna on Yokai.com