I thought I could compile the number of subways, but I stopped it because the number is very large. Now, read the citation below. It says that the Subways carry only 22% of the passengers and the ground-level and overground systems serve 78% of the passengers.I am guessing Tokyo in total has more than two dozen lines at this time. With interchanges of course.
My first visit to Tokyo was a revelation. Underneath the main streets and before you went down three four stories downstairs to the subways was a whole other network of underground malls and pathways, all squeaky clean. There is no way to tell these exist if one stands on the streets. Talking about the world trade center area.
Tokyo is a wonderful example of how to commercialize the area around the subway and metro stations.
It proves how large is their communications networks in Tokyo. You have to add with it the Bus service which is limited to bringing in train passengers to the railway stations from where the trains carry them to one Junction train station in the Yamate Line, a loop line.
This line then carries the passengers to their offices. This is certainly not Universal. Some trains from the suburbs may also take the office workers to the destinations.
"The Tokyo subway at 8.7 million daily passengers only represents 22% of Tokyo's 40 million daily rail passengers (see Transport in Greater Tokyo).[6] Other urban commuter rail systems include Keikyu Corporation (formerly the Keihin Electric Express Railway), Keio Corporation, Keisei Electric Railway, Odakyu Electric Railway, Seibu Railway, Tobu Railway and Tokyu Corporation".