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Tokyo Tokyo, Japan is the original mega-city, a throbbing, dynamic metropolis of 32.5 million people, well over 50 percent more massive than the world's next largest metropolitan areas. With populations clustering around 20 million people, the metro regions of Seoul, Mexico City, New York and Mumbai are all less than two-thirds the magnitude of the Tokyo metro area. Tokyo's ranking as the world's number one city goes well beyond the sheer scale of its population. Its lively Shibuya district is home to the w
