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The Shinjuku Route (新宿線, Shinjuku-sen), signed as Route 4 is one of the radial routes of the Shuto Expressway system in the Tokyo area. Route 4 runs west from Miyakezaka Junction (with the Inner Circular Route) in Chiyoda-ku and runs for 8.44 miles (13.5 km) through Shinjuku-ku, Shibuya-ku, and Suginami-ku. The Route 4 designation ends at the Takaido Interchange and the expressway continues as the intercity Chūō Expressway to Nagoya via Yamanashi and Nagano Prefecture.