As a rule, if we talk about a population of a city, we mean not only the city itself but its huge urban agglomeration as well.

As the data shows, in 2014 more than 13 million people lived directly in Tokyo. But if to take into account all the city's areas, the population was about 37, 5 million people! Won't you be surprised to know that this number is only one third of the total number of people in Japan?

So, Tokyo has been justly given the title of the most crowded city in the world.