is a tunnel on JR's Tokaido Shinkansen located between Kyoto city and Otsu City, Shiga Prefecture with total length of 5.045 km. It was built and completed in 1964.
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 Mapion maps Otowayama tunnel 音羽山トンネル