is a tunnel on Jōetsu Shinkansen near Echigo-Kawaguchi Station, Nagaoka city, Niigata Prefecture with total length of 8.625 km. It was built and completed in 1982. Uonuma Tunnel
See also List of tunnels in Japan Seikan Tunnel undersea tunnel between Honshu-Hokkaido islands Kanmon Railway Tunnel undersea tunnel between Honshu-Kyushu islands Sakhalin–Hokkaido Tunnel Bohai Strait tunnel
References
External links Gov. maps.gsi.go.jp Uonuma tunnel