The Hidden Market is a large marketplace hidden somewhere in the human world, its primarily noted as being a neutral hub; where all kinds of creatures, both spiritual and otherwise meet to discuss business. While largely unknown to the population of Soul Society, the Hidden Market has blossomed under the association of many influential businessmen, warlocks and perhaps above all, the Yoriteishou. The latter having used it to earn funding and fortune for their cause for centuries, as well as using it as a means to exchange true names of the Diabolus they know.