Shinjuku (新宿) is the 2nd downtown Tokyo which has some of the tallest buildings in Japan. If you like skyscrapers, check out the Shinjuku buildings.
Tourist info:
2nd downtown Tokyo is located Westside of Shinjuku Station. There is Tokyo Metropolitan Government and its building. The skyscrapers are Japanese version of Manhattan, New York. On the weekday, it is very crowded with a full of business people, but on the weekend, it is very quiet. 2nd downtown Tokyo is a giant artificial forest of building.
Access:
0. at Tokyo Station
1. use Chuoline (JR) to Shinjuku (13 min.)
2. walk west (5 min.)