This is the capital of the whole planet. This is where King Siba and Prins Sabi lives.
This is the poor city in Siba, where all the weak Siba-jins lives. Each Zokai(Friday), an elite from Sibaria or Nitrono attacks the village. This is where Naruto and Sakura starts.
Nitrono is the base camp where all the Siba Elites train to be bodyguards for King Siba.
This is just a normal town. This is where Luffy starts.
This is a rich place where everyone have bodyguards from Nitrono. This is the place where we see Goku and Piccolo.