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The Kanmon Straits (関門海峡 Kanmon Kaikyō) or the Straits of Shimonoseki is the stretch of water separating two of Japan's four main islands. On the Honshū side of the water is Shimonoseki (下関, which contributed "Kan" to the name of the strait) and on the Kyūshū side is Kitakyūshū, whose former city and present ward, Moji (門司), gave the strait its "mon". The straits silt up at the rate of about 15 centimetres per annum, and dredging has made it possible to build the New Kitakyushu Airport at low cost.

Contents 1 Population of Kanmon area 2 Tourism 2.1 Fireworks festival 2.2 Boat rides 2.3 Helicopter & airship flights 3 Transportation across the straits 4 Commercial importance 5 Historical significance 6 External links

The total population of the Kanmon area is about 1.3 million, counting the whole of Kitakyūshū (approx one million) and Shimonoseki (approx 300,000), although detailed definitions vary widely, see Fukuoka-Kitakyūshū. A new airport opened in Kitakyushu on March 16, 2006 which is expected to bring further prosperity in the form of increased tourism and trade to the area.

The Kanmon Straits Summer Fireworks Viewing dwarfed all the neighbouring ones with no less than 13,000 fireworks being let off in 2005, when the 18th annual display was held on August 13. There were large crowds of more than one million—watching from both sides of the straits. The Fireworks Festival is held on August 13 every year. The 20th festival in 2007 was televised by NHK and broadcast live nationwide in hi-vision.

The Voyager pleasure boat departs from Moji-ko and cruises the straits.

Helicopter joyrides are available from Kaikyo Dramaship in Moji-ko.

In October 2005, one of the world's largest airships currently flying (a Zeppelin NT imported from Germany) also passed through Moji on an all-Japan tour, and airship flights may be available to tourists in future. This airship was purchased by Nippon Airship Corporation in June 2004 and has been used in the Tokyo area and at the Aichi Expo 2005.

The Kanmon Straits can be crossed in a number of ways, the oldest of which are the ferries. There is a car ferry between Nishiminato (Kokura) and Hikinoshima (Shimonoseki) which takes about ten minutes, and a passenger ferry from Moji-ko to Shimonoseki (Karato wharf). There is also a bridge which carries an expressway. By far the most used method is a number of tunnels which carry the Shinkansen, trains, cars, and even one for pedestrians at the narrowest point.

The first railway tunnel was opened on November 15, 1942. The road tunnel was opened on March 9, 1958. The Kanmonkyo Bridge (see photo) was opened to vehicles on November 14, 1973. The Shinkansen tunnel was opened on March 10, 1975.

The Kanmon straits is also the connection between the Sea of Japan and the Inland Sea. It is used by many cargo ships as a short cut to Osaka and Tokyo from Korea and China. The New Kitakyushu Airport is also nearby.

• Battle of Dan-no-ura
• Bombardment of Shimonoseki
• Treaty of Shimonoseki

• Kanmon straits guide (Japanese)
• Kanmon straits on Wikitravel

Coordinates: 33°56′49″N, 130°56′48″E