The , 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 Keihin-Tōhoku Line ( 京浜東北線 けいひんとうほくせん ) is a railway line of East Japan Railway Company ( JR East ) that connects the cities of Saitama , Warabi , Kawaguchi , Tokyo , Kawasaki , and Yokohama .