I recently found out that I'm going to be moving to Tokyo! I'm trying to research the city. Have you been to Tokyo?
Yes, I have been many times. The Greater Tokyo Area has the highest population than any other metropolitan area in the world.
That's incredible! What is the population of Tokyo?
Transport in Greater Tokyo
The transport network in Greater Tokyo includes public and private rail and highway networks; airports for international, domestic, and general aviation; buses; motorcycle delivery services, walking, bicycling, and commercial shipping. While the nexus is in the central part of Tokyo, every part of the Greater Tokyo Area has rail or road transport services. The sea and air transport is available from a limited number of ports for the general public.
Public transport within Greater Tokyo is dominated by the world's most
city is defined as, "one having a population of 2 million and above".
Japan.
In Japan, it is division that has been set separately from administrative areas in order to define wide urban areas by the Statistics Bureau of the Ministry of Internal Affairs and Communications. 
The Greater Tokyo Area is the most populous metropolitan area in the world. 
- Central City (中心市)
- Those of the greater metropolitan areas are the 23 special wards in the metropolis of Tokyo and other designated cities.