It makes me nervous to think that I am walking in the undersea tunnel of Kanmon Straits. The Kanmon Tunnels are undersea tunnels that connect the Honshu side (Shimonoseki City, Yamaguchi Prefecture) and the Kyushu side (Kitakyushu City, Fukuoka Prefecture). Three Kanmon Tunnels penetrate under the seabed of the Kanmon Straits: the Kanmon Railway Tunnel for the Sanyo Main Line (conventional railway), the Kanmon Roadway Tunnel for the road (National Highway No. 2), and the Shin-Kanmon Tunnel for the Sanyo Shinkansen Bullet Train. The Kanmon Roadway Tunnel is also equipped with the tunnel for pedestrians. The first Kanmon Tunnel connecting Honshu and Kyushu was the Kanmon Railway Tunnel, opened in […]