Tsushima Current, Ocean current between Honshu and Kyushu, Japan.
The Tsushima Current flows northward from the eastern coast of China and eventually merges with the Kuroshio Current in the northern Pacific Ocean. It moves between the Japanese islands of Honshu and Kyushu, warming the waters of the Sea of Japan.
Trading routes between Japan and mainland Asia relied on this current for faster passage centuries ago. Sailors documented how the flow aided navigation and shaped maritime connections across the region.
The current shapes fishing practices along coastal communities. Local fishers time their work around seasonal changes in water conditions and the movement of fish populations.
When traveling by ship between Japanese ports, the current's strength varies seasonally and affects fuel efficiency and journey time. Captains typically plan routes around summer months when the flow is strongest to make the best use of natural propulsion.
Where warm Tsushima waters meet cold Arctic currents, distinctive marine species thrive in the created environment. This meeting of different water temperatures produces conditions found nowhere else in the Sea of Japan.
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