![Tokyo - Earth's Model Megacity](https://hight3ch.com/wp-content/uploads/2018/07/tokyo-earths-model-megacity-800x440.jpg)
Tokyo is the most successful metropolis in the history of the world with 39 million residents, 50% more people than any other urban area. It is the safest big city on the planet and has a two trillion dollar GDP–an economy larger than all but eight entire countries.