1. Tokyo, Japan
Metropolitan area: 34 million people
City: 12.5 million people
Tokyo is by far the largest urban region in the world. Despite its size and complexity, Tokyo has a very efficient public transportation, which accounts for almost 80 percent of all daily journeys in Tokyo.
Urban Detail:
Tokyo Bay has been gradually filled up to create more space for housing and offices. Odaiba, an island entirely created out of waste material, became one of Tokyo’s most interesting tourist spots with futuristic architecture, shopping, and entertainment centers. (Photo: Miki Yokoyama)