dbz universe is infinite:
The endless, expansive space wrapped around every celestial body that exists in the Living World. Along with the "Demon Realm," it is a single, large world in the Living World. In the world of Dragon Ball, the universe is located beneath the World Beyond, and it is hermetically sealed by a barrier that is engraved with a strange design. Within the universe, there are "nebulae" composed of innumerable stars, and there are "galaxies" composed of innumerable nebulae. There is a ruling Kami for each galaxy. Earth resides in the Solar System, a galactic nebula on the outskirts of the North Galaxy.
[Par.] A "Cosmic Police Organization" exists in the universe. However, they lack the fighting ability to oppose Freeza and the Saiyans. (Daizenshuu 4, Page 72)
Means each region of the universe, which is divided into East, West, South, North. It is expressed as the "East Area" and the "West Area." The areas divided into East, West, South, North are governed by respective Kaiou.
[Par.] Like the universe, the Demon Realm is also divided into multiple areas.