The rapid industrialization that occured in the second half of the twentieth century led to a massive internal migration and urbanization of many East Asian countries. As a result, we can see that seven, out of the top ten largest cities in the world, are located on Asian soil with Tokyo (Japan) being in the first place and Delhi (India) trailing in the second. As the twenty-first century progresses we are likely to witness a much higher ranking for many of the regional urban areas.