Nagoya is Japan's fourth-largest city after Tokyo, Yokohama and Osaka and one of the nation's major economic centers. In terms of manufacturing, as home to automaking giants Toyota, Honda, Mitsubishi Motors, the city is the prime carmaker centre in the country. Other high-tech industries are also located there. The city also has the sixth most busiest train station in the country. The strong industry base is one of the major driving forces in continuing to build and expand large office spaces. Most skyscrapers are located in the downtown area of , close to the main train station.