Japan is geographically wide spread from North East to South West. Urban areas are however concentrated into three major “greater” areas:
- Greater Tokyo Area: consisting of Tokyo, Kanagawa, Saitama and Chiba prefectures
- Greater Nagoya Area: consisting of Aichi, Gifu and Mie prefectures
- Greater Kansai Area: consisting of Osaka, Kyoto, Hyogo and Nara prefectures
The three greater urban areas occupies over 50% of population and GDP of Japan. Among the three, Greater Tokyo Area is the largest, concentration of 30% of population and GDP of Japan.
Source: Japan Cabinet Office (Japanese)