It originates at Nihonbashi in Chūō, Tokyo, and terminates in the city of Niigata (the capital of Niigata Prefecture), where it meets National Routes 7, 8, 49, 113 and 116).
It starts at Nihonbashi in Tokyo and ends in Niigata City, which serves as the capital of Niigata Prefecture, where multiple national highways converge, including routes 7, 8, 49, 113, and 116.