Syakado Kiritoshi (釈迦堂切通し) is one of the historical and great nature monument in Kamakura. It was build around 1200 by cutting and digging small rock valley for transportation. The shape of the tunnel is still preserved from Kamakura period. It was name by when Yasutoki Hojo (北条泰時) built temple for the memorial service for his father.
You can access this tunnel, but technically you cannot go through. Be careful, after rain there are many risk to have rock falling. It will be all self-responsibility whatever kinds of accident you have.
0. at Kamakura Station.
1. use Keikyu Bus to Sugimotohonzan (20 min.)
2. walk south (15 min.)