6 feet under is where the roof starts. akuma's house is made of pure stone. while most people who stumble upon it see it as the gate way to hell they are correct. akuma is a pyrotechnic. he uses his house to get closer to his power source. the floor is only an illusion that can be walked on as is the rest of his furniture. few people know of its whereabouts exactly in the world. the 2 that know are Ryu maramasa and Dante Kazahana. while the house is used for rest the ground above it is used for the meeting place for the akatski