Tokyo "hotspots"

Tokyo hotspots

Tokyo has no main center compared to traditional European cities. At the geographical center of Tokyo you find the Imperial Palace, which is basically closed for the public. Instead one find "hotspots", located along the JR Yamanoto Line loop, the main railroad that circles around inner Tokyo. Some of the main "hotspots" are listed on the map, and there are several more.
From personal experience, it can be very intense to enter a main "hotspot" such as Shibuya. You are bombarded with information, neon signs, commercials, sounds, people and so on, but as soon as you step into one of the side roads, it is a quiet as in a Norwegian town on sundays. Then you can walk through the forest of buildings until you stumble upon the next hotspot, maybe 10 minutes away.

Here you can read about the "hotspots" of Tokyo, or neighbourhoods as they are called: http://www.frommers.com/destinations/tokyo/0085020048.html

What I wish to find out is, do the hotspots have the same urban typology/structure all around, or do they differ so much that the almost can be called unique, urban villages in the continous flow of buildings? How can the structures be charachterized? Can a positive proposal in one hotspot have the same effect if it is excecuted in another one aswell?