Tokyo station is a huge train terminal linking numerous train lines that spread out all over Japan, with bullet trains, Japan Railwa trains, and the Tokyo Metro subways. With the Imperial Palace (the former Edo castle) located to its north, Tokyo station is the entrance to Tokyo both in name and function.
The design of Tokyo Station is said to be based on that of Amsterdam Centraal Station in The Netherlands, which opened in 1889. Tokyo Station was badly damaged during World War II but underwent a major renovation, completed in 2012, returning the buildings to their former glory. Further major improvements are currently underway at Tokyo Station, the major project being to make the station barrier-free by 2020, the year the Olympic Games is due to be hosted in Tokyo.
The main station façade on the western side of the station is brick-built, surviving from the time when the station opened in 1914. The main station consists of 10 island platforms serving 20 tracks, raised above street level running in a north-south direction. The main concourse runs east-west below the platforms.
The Shinkansen lines are on the east (or Yaesu) side of the station, along with a multi-story Daimaru department store. Underground are the two Sōbu/Yokosuka line platforms serving four tracks (five stories below ground level) to the west of the station; the two Keiyō Line platforms serving four tracks are four stories below ground some hundreds of meters to the south of the main station with moving walkways to serve connecting passengers.
The whole complex is linked by an extensive system of underground passageways which merge with surrounding commercial buildings and shopping centers. So you can definitely spend even whole day in this station. Tokyo station is anyway center of Tokyo, so if you start your sightseeing here, you can get easily anywhere. Interesting? Please check it out!