The name literally means "Tokyo-Yokohama and Tohoku Line." "Tohoku" refers to the Tohoku Main Line .
SERVICE
Trains run every 2–3 minutes at peak hours, every 5 minutes during midday, and less frequently the rest of the time. In most instances, these trains are classified as ''futsu'' (local), stopping at all stations en-route. However, during middays they are classified as ''kaisoku'' (rapid). These rapid trains skip some stations in central Tokyo , where it runs parallel to the Yamanote Line . Some services run southwest beyond Yokohama on the Negishi Line to and from Isogo then finally to the terminus of the Negishi Line at Ofuna .
Presently, Series 209 EMUs run on all Keihin-Tohoku Line services.
