The Black Ships (in Japanese: 黒船, romanized: kurofune, Edo period term) were the names given to both Portuguese merchant ships and American warships arriving in Japan in the 16th and 19th centuries respectively.
In 1543, Portuguese initiated the first contacts, establishing a trade route linking Goa to Nagasaki. The large carracks engaged in this trade had the hull painted black with pitch, and the term came to represent all Western vessels. In 1639, after suppressing a rebellion blamed on the influence of Christian thought, the ruling Tokugawa shogunate retreated into an isolationist policy, the Sakoku. During this "locked state", contact with Japan by Westerners was restricted to Dutch traders on Dejima island at Nagasaki.