The Kanmon Railway Tunnel, Kanmon Roadway Tunnel, and Shin-Kanmon Tunnel are undersea tunnels crossing the Kanmon Straits between Shimonoseki, Yamaguchi, and Kitakyushu, Fukuoka in western Japan. When opened in 1942, the railway tunnel provided the first direct link between Honshu and Kyushu, two of Japan’s four main islands.
Kitakyushu (Japanese: 北九州市 Hepburn: Kitakyūshū-shi, lit. “North Kyushu City”) is one of two designated cities in Fukuoka Prefecture, Japan, together with Fukuoka, with a population of just under 1 million people.
Shimonoseki (下関市 Shimonoseki-shi) is a city located in Yamaguchi Prefecture, Japan. Shimonoseki is the biggest city in Yamaguchi Prefecture. It is at the southwestern tip of Honshu, facing the Tsushima Strait and also Kitakyushu across the Kanmon Straits.
Nicknamed the “Fugu Capital,” it is known for the locally caught pufferfish and is the largest harvester of the pufferfish in Japan.
As of October 1, 2016, the city has an estimated population of 265,684 and a population density of 370 persons per km². The total area is 716.14 km².
AloJapan.com