Keihin–Tōhoku Line
The Keihin–Tōhoku Line (, ), 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(), Yokohama() and the Tōhoku Main Line(). The Keihin-Tōhoku Line officially follows portions of the Tōhoku Main Line and Tōkaidō Main Line. Between Ueno and Akabane stations the Keihin–Tohoku and Tohoku Main 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() on system maps and in-train station guides. Keihin-Tōhoku Line—Negishi Line trains are recognizable by their light blue stripe (the line's color on maps is also light blue).
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Saitama
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Kawaguchi
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Tokyo
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Kawasaki
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Yokohama
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East Japan Railway Company
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Tōhoku Main Line
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Tōkaidō Main Line
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Ueno
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Akabane
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Negishi Line
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Keihin–Tōhoku Line
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Keihin–Tōhoku Line
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