The Yamanote-sen line is a JR East line in Tokyo. This loop line is one of the busiest and most important of train lines in Tokyo, connecting most of the major areas of the capital city. There are 29 stations on the 34.5km route, with all trains stopping at each station. All but two stations offer connections with other train or subway lines.
Trains are very regular running from dawn until early the next morning and ever 2.5-4 minutes depending on the time of day. Trains running in a clockwise direction are known as sotomawari; trains running in an anti-clockwise direction as uchi-mawari both with starting point listed as Shinagawa Station.
Yamanote-sen Station names and distances from Shinagawa Stationwithin Tokyo
Officially, the Yamanote-sen is from Shinagawa Station to Tabata Station.
Tabata Station to Tokyo Station is part of the Tohoku Honsen.
Tokyo Station to Shinagawa Station is part of the Tokaido Honsen.
However, most people refer to the whole loop as the Yamanote-sen.