Japan National Route 4 partially coincident with Japan National Route 104
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.Aomori Prefecture
Sannohe–Nanbu–Gonohe–Towada–Shichinohe–Tōhoku–Noheji–Hiranai–Aomori
Easternmost point: 150 meters (490 ft) south of the northern end of the route's concurrency with National Route 104 in Nanbu, Aomori.
Northernmost point: Hamago, Hiranai, Aomori 200 meters (660 ft) south of Mutsu Bay.
End point: Aomori (ends at the eastern terminus of the west bypass of National Route 7)
partially overlapping with partially intersecting with partially sharing with partially matching with partially aligning with