Shinjuku Station, Tokyo
Shinjuku station is the busiest station in the world with more than 2 million people passing through it and quite accordingly it is rather complex. If you come to Tokyo from the western Kantô area or generally from the west on other trains than the Shinkansen then your might be bound for Shinjuku. From here do also the trains to the Chichibu-Tama-Nationalpark and Mount Fuji depart.
The lines that go to or pass through Shinjuku include the Yamanote, Chûô, Saikyô, Seibu-ikebukuro, Odakyû and the Keiô Shin-sen line as well as the Metro lines Shinjuku and Marunouchi.
Tokyo is very famous for its rush-hour and to get to know it you should go to the Yamanote line on track 12 from 7.30 til 8.30 in the morning. The Yamanote as the most important line is the most packed and it is actually fun as a tourist to get on the train although it does not really look like it.
in addition it should be mentioned that west of the station you'll find the skyscraper district, whereas on the eastern side you'll find Kabuki-chô, Tokyo's largest red-light district.
The Japanese transportation system requires that you first obtain a ticket from one of the many ticket dispensing machines for that line. Get a Suica card to get around on the JR line and avoid the non-stop rush at the ticket dispensing machines. It is basically a prepaid card that you can get a special machines (usually located near the regular ticket machines) that allows you through the gate by simply waving it over a scanner. At your final destination, the exit gate display will also show you what the trip cost you and what you have left in balance. Well worth it especially if you are planning to travel around the Yamanote, Sobu and Chuo lines and during rush hour.
I went by foot to shinjuku station,it took me 2h30 to cross several districts;shinjuku station is the 2nd biggest station in tokyo,and there is a direct train to Chiba
picture is:district of akihabara