Greater Tokyo Area

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The Greater Tokyo Area (GTA) is a densely-populated Japanese metropolitan region consisting of Tokyo and the surrounding area, in the larger area of Kanto on Honshu island. It has several definitions and therefore names in Japanese; one is 'One Metropolis, Three Prefectures' (一都三県 Itto Sanken) - i.e. Tokyo plus the prefectures of Chiba, Kanagawa and Saitama. This is the world's most populated region,[1] with 34,634,000 inhabitants recorded in 2006[2] - over a quarter of the country's population. The approximate area is 5,200mi² (13,500 km²).[3]


  1. United Nations: 'World Urbanization Prospects: The 2007 Revision Population Database'. Select 'Japan' in the right hand column and click 'Display'.
  2. Japan Statistical Yearbook: 'Population by Prefecture 1920-2006'. Ministry of Internal Affairs and Communications. .xls document.
  3. As the Keihinyo Major Metropolitan Area (京浜葉大都市圏 Keihinyoo Daito-shiken), which excludes Saitama (incorporated in 2001, so the GTA is actually larger). See Japan Statistics Bureau: 'Table 92'. 2000. .xls document.

See also