Japan–Korea Undersea Tunnel at about ₩100 trillion (approx. US$90 billion), which would produce an extremely low benefit-to-cost result. In 2014, the South Korean Busan Development Institute estimated the undersea tunnel could create ₩54 trillion won (원54T, or US$53 billion) in economic benefits and provide about 45,000 jobs. In an April 2009 editorial, former Justice Ministers Daizō Nozawa of Japan and Kim Ki Chun of South Korea remarked on some of the similarities of the proposed Japan–Korea tunnel to the world's present longest undersea tunnel. The Channel Tunnel runs for 50.45 km linking the United Kingdom and France, and opened in May 1994: At
England European continent than any other part of mainland Britain. It is separated from France (Hauts-de-France) by a sea gap, though the two countries are connected by the Channel Tunnel near Folkestone. England also has shores on the Irish Sea, North Sea and Atlantic Ocean. The ports of London, Liverpool, and Newcastle lie on the tidal rivers Thames, Mersey and Tyne respectively. At , the Severn is the longest river flowing through England. It empties into the Bristol Channel and is notable for its Severn Bore (a tidal bore), which can reach in height. However, the longest river entirely in England