Nangosan Tunnel
Nangosan Tunnel (Nangōsan tonneru) is a tunnel under Mount Nangō on Tokaido Shinkansen operated by Central Japan Railway Company located between Atami Station and Odawara Station with total length of 5.170 km. It was built and completed in 1964.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).