It is the easiest to travel with trains and subway throughout Japan. You only have to be careful that not all the tracks belong to the same company (Hello Osaka!) - so you have to buy different tickets on some tracks. But for example in the very center of Tokyo there is only Japan Railway. Tickets can be bought in ticket machines before entering the metro/platform in Tokyo (only with cash). Some bigger stations have sales window, where you can pay with your credit card. JR offers several types of multi-day passes for tourists, so it's good to calculate if you should buy this JR pass and usually it's worth it because trasnportation in Tokyo (and generally throughout Japan) is quite expensive. In addition, some of these passes can also be used on the Shinkansen train, so you can go outside of Tokyo faster. You can find the Tokyo train map with basic information here . There is a big map with all the train and subway stations near ticket machines. Your current station is ...