Kazazumi

Kazazumi is a beautiful island tall mountains, lovely trees and waterfalls. Sadly this island is unsafe for women.  The cities have large red-light districts with many brothels and taverns.
Encouraged by his succubus concubine the lord of the island has set up a flourishing sex-slave trade. A woman alone here is running the risk of being abducted and sent to the brothels. 
Because of this native women are never seen alone but always with male gaurdians such as their husband or father or brother. On the plus side because of the good weather food is plentiful and cheap.