Shin-Kanmon Tunnel

The Shin-Kanmon Tunnel is a undersea railway tunnel under the Kanmon Straits connecting Shin-Shimonoseki Station on the Japanese island of Honshu and Kokura Station on Kyushu. At the time of opening in March 1975, it was the longest railway tunnel in Japan before being overtaken by in 1988 the opening of the Seikan Tunnel.

Overview

Starting point: Ichinomiya Gakuencho, Shimonoseki City, Yamaguchi Prefecture
End point: 2-chome, Shimotomino, Kokurakita-ku, Kitakyūshū, Fukuoka
Overall length:
Undersea bed section:
Below sea level section:
Tunnel gradient: 18/1000
Track gauge: 1,435 mm
Electrification: 25 kV AC, 60 Hz, overhead catenary

The construction of the new tunnel started as a project to connect Honshu and Kyushu with a high-speed railway. The tunnel was constructed at the shortest section in the Kanmon Strait between Dannoura, Shimonoseki City - Mekari, Mojiku, Kitakyushu. Although the entire Shin-Kanmon Tunnel is 5 times longer, the undersea section is shorter than the conventional line Kanmon Tunnel.
There is a distance marker about from the middle point of the tunnel. This is the only 1000 km railway marker in Japan.

Coordinates

Shimonoseki entrance:
Moji entrance: