Japan National Route 4 partially coincident with Japan National Route 47
Saitama and Ibaraki prefectures
Sōka–Koshigaya–Kasukabe–Sugito–Satte–Kuki
Koga
Westernmost point: Kuki, Saitama just west of a bridge carrying the route over the Tone River.
partially overlapping with partially intersecting with partially sharing with partially matching with partially aligning with