Nabetachiyama Tunnel, Railway tunnel in Niigata Prefecture, Japan
The Nabetachiyama Tunnel is a railway tunnel in Niigata Prefecture that passes beneath the Higashikubiki Hills. It connects Matsudai with Hokuhoku-Oshima and carries both passenger and freight trains on the Hokuhoku Line.
The project began in 1968 and went through multiple construction phases over many years. The tunnel opened to service in 1995 after completion of the extensive underground work.
The tunnel system represents Japanese engineering excellence in railway infrastructure, demonstrating the nation's commitment to efficient transportation networks in mountainous regions.
The tunnel is exclusively for train use and not open to pedestrian access. The best view of the structure is from outside near the entrances close to both towns.
The tunnel structure incorporates dual tracks with a specific gauge of 1,067 millimeters, enabling trains to maintain consistent speeds throughout the underground passage.
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