| Bentenyama Railway Tunnel | |
| Line: | Tokaido Shinkansen |
| Location: | between Shin-yokohama Station and Odawara Station |
| Opened: | 1962 |
| Status: | active |
| Traffic: | Railway |
| Operator: | Central Japan Railway Company |
| Character: | Passenger and Freight |
| Linelength: | 1.316km (00.818miles) |
| Notrack: | 2 |
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.[1] [2] [3] 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.[4]