Back in 1228 A.D. a mysterious woman from the east came in the Land of the Setting Sun. She was searching for the land with the most amount of devils, monsters, creatures yet to be tamed by men and, of course, she found a particular country. An island, to be exact.
The woman from the east was a prostitute, an extremely talented, famous and intelligent lady in her 40s that was well aware of the potential business those creatures represented. An untapped potential, in fact.
Back in the days, there weren't any brothels for creatures, and sure there weren't for yokai, the most ugly and naughty of all the supernatural creatures! And yet the yokai had the same needs man had and they lusted for young feminine bodies in the same way!
They could have payed, also. Every time you lose money it's a yokai's fault, didn't you know?
The yokai were rich, unsatisfied and there were a lot of them. All of them were willing to spend all they had for a night with a beautiful, young, experienced young lady (or not, that dipended) and unlike men they weren't stingy or violent towards the girls of the brothel.
What an incredible idea that was! The Yokai Brothel, built on the edge of an high precipice, called the attention of all the Yokai of the island and, yes, there were thousand of them.
The mysterious, eastern lady knew she created something special.
That day, January 13 of 1228 A.D. the Yokai Brothel was born.