Soya Strait Crossing (Napoleon's World)

The Soya Strait Crossing, also known as the Hokkaido-Karafuto Link, is a car-and-rail megaproject completed in Japan in 2017 after fourteen years of construction, providing a bridge-and-tunnel link across the Soya Strait separating the islands of Karafuto and Hokkaido. At 42 km long, it is one of the largest megaprojects ever built, and was opened to coincide with the Karafuto Strait Crossing between the Japanese Mainland Territories and northern Karafuto in 2014. With the completion of the link, Japan's rail and highway system is now connected on all Home Islands save for Taiwan as well as the Asian mainland. The project has been met with considerable criticism for its expense as well as environmental concerns related both to its construction and potential future development in Karafuto and the JMT.