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Japan is the most populated region in the world.
region 4
The second most populated region, as of the 2010 Census and Housing Population by the National Statistics Office, is:National Capital Region (NCR) at 11,855,975The most populated regions is Calabarzon (Region IV-A) at 12,609,803.
Toronto
London is not a region.......
The most sparsely populated region in the world is the Sahara Desert in Africa. It is one of the hottest and largest deserts on Earth, covering over 9 million square kilometers with very low population density due to its extreme arid conditions.
according to the University of Bradford (Human Economics department the most populated region in the Philippines is Calabarzon
india
Antarctica.
Toronto
Alaska
the Midlands