NEW YORK’s subway, London’s underground and Seoul’s metro all have things in common.They’re bigger than the subway system in Tokyo – they all have more stations and extend over greater distances.

But Tokyo is far and away the world’s largest city. It dwarfs the others and it’s now home to more than 37 million people.Beneath these streets is a system that defies convention. It’s the world’s busiest subway – moving 3.9BN passengers each year, equivalent to half the world’s population, but all in an understated and efficient way.

Japan’s capital has mastered the art of mass transit, moving more people with fewer lines, fewer stations, and in a smaller area than any other major city. In our opinion, it’s the world’s best subway.