The
Statistics Bureau of Japan (SBJ) defines a metropolitan area as one or more central cities and its associated outlying municipalities. To qualify as an outlying municipality, the municipality must have at least 1.5% of its resident population aged 15 and above commuting to school or work into one of the central cities. To qualify as a central city, a city must either be a
designated city of any population or a non-designated city with a city proper population of at least 500,000. Metropolitan areas of designated cities are defined as "major metropolitan areas" (大都市圏) while those of non-designated cities are simply "metropolitan areas" (都市圏). If multiple central cities are close enough such that their outlying cities overlap, they are combined and a single metropolitan area is defined rather than independently.
2015 Population Census The metropolitan areas written in bold are the 11 major metropolitan areas of Japan. • 2015 • MMA: Major Metropolitan Area • MA: Metropolitan Area • Source: Statistics Bureau of Japan
2010 Population Census The metropolitan areas written in bold are the 11 major metropolitan areas of Japan. • 2010 • MMA: Major Metropolitan Area • MA: Metropolitan Area • Source: Statistics Bureau of Japan Changes from 2005 census The following changes to metropolitan area definitions were made in the 2010 Census report. • New central cities in Kantō and Keihanshin major metropolitan areas •
Sagamihara in the Kantō MMA and
Sakai in the Keihanshin MMA have become designated cities in 2010 and 2006 respectively. These cities are already well within their MMAs and should not greatly alter their formation. • Niigata and Okayama major metropolitan areas •
Niigata became a designated city in 2007 and Okayama became a designated city in 2009. These cities therefore formed major metropolitan areas in the 2010 census. • Shizuoka, Hamamatsu major metropolitan area •
Hamamatsu also became a designated city in 2007. As its outlying areas overlap with
Shizuoka, the two cities formed a single major metropolitan area in the 2010 census. • Utsunomiya metropolitan area •
Utsunomiya qualified as a central city for the 2010 census, resulting from mergers with neighboring municipalities and subsequent population growth.
2005 Population Census The metropolitan areas written in bold are the 8 major metropolitan areas of Japan. • October 1, 2005 • MMA: Major Metropolitan Area • MA: Metropolitan Area • Source: Statistics Bureau of Japan ==Urban Employment Area==