Japan–Korea Undersea Tunnel, Railway tunnel project between Karatsu, Japan and Busan, South Korea.
The Japan-Korea Undersea Tunnel is a proposed railway connection between Karatsu in Japan and Busan in South Korea. The route would cross approximately 231 kilometers beneath the Korea Strait while incorporating the islands of Iki and Tsushima as intermediate points.
Discussions about connecting Japan and Korea through an undersea tunnel first emerged in 1917, with serious planning efforts beginning in the 1940s. Since then, multiple feasibility studies have been conducted to evaluate the technical and financial challenges of this ambitious undertaking.
The tunnel project represents an opportunity to strengthen connections between Japanese and Korean communities through direct rail transportation across national boundaries.
Access to this project is informational only, as it remains in the planning phase and construction has not begun. Those interested in detailed information can contact government agencies or research institutions in Japan or South Korea.
Upon completion, this tunnel would surpass the Channel Tunnel between France and England to become the world's longest undersea railway tunnel. The technical challenge stems from the considerable water depth and strong ocean currents that characterize this region.
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