Japan has an efficient public transportation network, especially within metropolitan areas and between the large cities. Japanese public transportation is characterized by its punctuality, its superb service, and the large crowds of people using it. Japan has an efficient, safe and cost reasonable system of city subways, providing rapid movement around its inner urban areas. Most cities in Japan are covered by local bus networks. In larger cities, people usually take subway rather than buses. In small cities and rural areas, buses are the most useful public transportation. As a developed country, the train system in Japan is very convenient and efficient. It serves to the chain of the whole islands. Because Japan is a very long archipelago, airplanes are also a very popular means of getting around the country, and almost every county government has its own airport.