The Tokyo subway may appear difficult at first glance, as it is, after all, the second most complex subway map in the world. However, with a little practice and some attention, you will notice that it's easier than you think. The lines are colour coded and all have numbers for your ease. When you navigate the subway underground, you will see clear signs for connections. Even if you don't know how to pronounce the name of the lines, you can just remember the colour and the number you need for your ease.