Davis Strait estimated that at least 13% of the world's undiscovered oil deposits and 30% of the world's undiscovered gas pockets are located in the Arctic, with the seas around Greenland potentially holding large amounts of natural gas and lesser amounts of crude oil and natural gas liquids. This has led Greenland's minister and provincial council to offer a large number of off-shore concessions to potential hydrocarbon (oil and gas) extraction. The largest concessions areas are located in seas west of Greenland, primarily the Davis Strait and Baffin Bay, but with several smaller concessions in the Greenland Sea in the east also.
Tsushima Strait ferry service operates between Shimonoseki at the western tip of Honshu and Busan (aka Pusan), South Korea. Another operates between Shimonoseki and Tsushima Island. The cities of Kitakyushu (Kyushu) and Shimonoseki (Honshu) are joined by an ocean-spanning bridge across the Kanmon Strait joining those cities with Nagasaki, which latter city serves as prefecture-level capital and administers both Tsushima and Iki Island. The Kanmon Strait lies approximately 85 miles (135 km) due east of the center of Tsushima Island, while Nagasaki city proper lies about 100 miles (165 km) to the south-south-east of the southern tip of the island. The earliest