Tōhoku Main Line in the context of "Tokyo Station"

The Keihin–Tōhoku Line (Japanese: 京浜東北線, Hepburn: Keihin-tōhoku-sen) is a railway line in Japan which connects the cities of Saitama, Kawaguchi, Tokyo, Kawasaki, and Yokohama. It is part of the East Japan Railway Company (JR East) network. The line's name is derived from the characters for Tokyo (Japanese: 東京), Yokohama (Japanese: 横浜) and the Tōhoku Main Line (Japanese: 東北本線). The line runs parallel with the Tōkaidō Main Line between Yokohama and Tokyo and the Utsunomiya Line (part of the Tōhoku Main Line) except between Ueno and Akabane stations where the two lines are physically separate and thus alternate routes.

Most Keihin–Tōhoku Line trains have a through service onto the Negishi Line between Yokohama and Ōfuna stations. As a result, the entire service between Ōmiya and Ōfuna is typically referred to as the Keihin-Tōhoku–Negishi Line (Japanese: 京浜東北・根岸線) on system maps and in-train station guides. Keihin–Tōhoku–Negishi Line trains are recognizable by their light blue stripe (the line's color on maps is also light blue).

The Utsunomiya Line (Japanese: 宇都宮線, romanized: Utsunomiya-sen) is the name given to a 163.5-kilometer (101.6 mi) section of the Tōhoku Main Line between Tokyo Station in Tokyo and Kuroiso Station in Nasushiobara, Tochigi, Japan. It is part of the East Japan Railway Company (JR East) network.

The Takasaki Line (Japanese: 高崎線, romanized: Takasaki-sen) is a Japanese railway line which connects Ōmiya Station in Saitama, Saitama Prefecture and Takasaki Station in Takasaki, Gunma Prefecture. It is owned and operated by the East Japan Railway Company (JR East).

All services on the line (excluding through Shonan-Shinjuku Line trains) run to/from Ueno Station in Tokyo via the Tōhoku Main Line. The line was extended to Tokyo Station via the Ueno-Tokyo Line that opened in March 2015.

The Jōban Line (Japanese: 常磐線, Hepburn: Jōban-sen) is a railway line in Japan operated by the East Japan Railway Company (JR East). The line officially begins at Nippori Station in Arakawa, Tokyo before the line officially ends at Iwanuma Station in Iwanuma, Miyagi. However, following the opening of the Ueno–Tokyo Line, Jōban Line train services originate at Shinagawa or Ueno; likewise, Jōban Line trains continue past Iwanuma onto the Tōhoku Main Line tracks to Sendai. The line approximately parallels the Pacific coasts of Chiba, Ibaraki, and Fukushima Prefectures.

The name "Jōban" is derived from the names of the former provinces of Jōshū (Japanese: 常陸), and Banshū (Japanese: 磐城), which are connected by the line to reach Tokyo.

The Yamanote Line (Japanese: 山手線, romanized: Yamanote-sen) is a railway loop service in Tokyo, Japan, operated by the East Japan Railway Company (JR East). It is one of Tokyo's busiest and most important lines, connecting most of Tokyo's major stations and urban centres, including Marunouchi, the Yūrakuchō/Ginza area, Shinagawa, Shibuya, Shinjuku, Ikebukuro, and Ueno, with all but two of its 30 stations connecting to other railway or underground (subway) lines.

Internally, JR East refers to the "Yamanote Line" as the quadruple-track 20.6-kilometre (12.8 mi) corridor between Shinagawa and Tabata via Shinjuku. The corridor consists of a pair of tracks used by Yamanote local trains and another parallel pair of tracks called "the Yamanote Freight Line" used by the Saikyō and Shōnan-Shinjuku line trains, some limited express services, and freight trains. In everyday usage, branding on maps and station signage, the "Yamanote Line" refers to the local service (also called "system") running the entire 34.5 km (21.4 mi) line looping between the Yamanote corridor via Shinjuku Station and the central portions of the Tōhoku and Tōkaidō Main Lines Via Tokyo Station. (This article uses the same definition unless noted otherwise.)