The Keihin-Tōhoku Line is a major commuter train line in Japan, operated by the East Japan Railway Company (JR East). It runs between Tokyo and Kawasaki, covering a distance of approximately 45 kilometers. The line connects several important urban areas, making it a vital transportation route for daily commuters. This line is part of the larger Tōhoku Main Line and shares tracks with the Negishi Line in some sections. It features frequent services, with trains running every few minutes during peak hours. The Keihin-Tōhoku Line is known for its reliability and efficiency, serving millions of passengers each year.