The first section was opened in 1972 by Japan Highway Public Corporation and construction proceeded in stages until the entire route was completed in 1988. On October 1, 2005, all national expressways
Oyashirazu, Itoigawa, Niigata Prefecture Left:Hokuriku Expressway Center:National Route 8 and JR Hokuriku Main Line Right: Niigata Prefectural Road Route 525
National Route 8 is a major highway in the Hokuriku and Kansai regions of central Japan. The 574.1-kilometer highway begins at an intersection with National Routes 7, 17, 49, 113, and 116 in Chūō-ku,
Masaya-koji Street, near the origin of Route 8 in Niigata City