Kuukaku's house is in an unnamed location in Rukongai. On the outside, it looks like a shack with your a huge chimney (which is really a cannon), and two arms that hold a sign saying that it is "SHIBA KUUKAKU".

When you enter the house, you are immediately lead down by a flight of stairs. Continuing with the houses’ normality this staircase extends for more than your typical twelve to fourteen stairs, it goes on for maybe more than fifty. Not only that but when you reach the end of the stairs you find yourself within a humongous underground mansion. There are several rooms extending over a wide area. One of the doors leads to the "cannon room". The cannon is used to launch fireworks by Kuukaku, who is known as “Rukongai’s Number One Fireworks Maker.” It was also to penetrate the Court of Pure Soul's barrier.