This document is a travel guide for Tokyo, Japan. It summarizes that Tokyo is Japan's main city and it has made great efforts to be open to tourists. The train system is very efficient and punctual, helping travelers navigate the huge city. Several notable areas of Tokyo are mentioned, including Shinjuku, Harajuku, Akihabara, and Ikebukuro - each with their own character and things to see. In closing, the document states there are countless places to explore in Tokyo and it should be a top travel destination for everyone.