It is one of the busiest and most important lines. Within the Yamanote circle exists a dense subway system of two major subway companies. From the large Yamanote stations several lines lead to the outer regions of the city and the suburbs. The lines are owned by many private railway companies. Some of these companies belong to a department store chain like Tobu, Seibu or Tokyu.
Every company has it's own fare system.
The largest company, the privatized JR East is usually slightly more expensive than the other companies. The city of Tokyo does not have one downtown but a few of them. Accordingly there are many major stations throughout the city. Around and above the station one can find many department stores , shopping areas, a big entertainment district, restaurants , and love hotels . The shinkansen trains heading for Northern Japan also stop at Ueno station.