Bentenyama Tunnel
Bentenyama Tunnel (Bentenyama tonneru) is a tunnel on Tokaido Shinkansen operated by Central Japan Railway Company located between Shin-yokohama Station and Odawara Station with total length of 1.316 km. It was built and completed in 1962. The Benten-yama tunnel, spanning approximately 1.3 kilometers, sits close to Kozu area in the southwestern region of Oiso hill land (Kanagawa Prefecture), predominantly characterized by diluvium-tertiary formations of soil. Alongside the tunnel's path, the hill is primarily composed of alternating layers of sand gravel beds and tuffaceous mudstone beds.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).