Akakura Tunnel

Akakura Tunnel (Akakura tonneru) is a tunnel on Hokuhoku Line that runs through Mt. Kasagi from Noda, Minamiuonuma city, Niigata Prefecture to Niizako, Tokamachi city, Niigata Prefecture with total length of 10.472 km. It was built and completed in 1997.

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Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

Other tunnels in Japan

Delaware Aqueduct United States · 137 km Päijänne Water Tunnel Finland · 120 km Orange–Fish River Tunnel South Africa · 82.8 km Ishikawa Tunnel Japan · 78.5 km Brenner Base Tunnel Austria · 64 km Mont d'Ambin base tunnel France · 57.5 km Gotthard Base Tunnel Switzerland · 57.09 km Hong Kong–Zhuhai–Macau Bridge China · 55 km