trade calibers

Nanban trade (南蛮貿易, Nanban bōeki, "Southern barbarian trade") or the Nanban trade period (南蛮貿易時代, Nanban bōeki jidai, "Southern barbarian trade period") was a period in the history of Japan from the arrival of Europeans in 1543 to the first Sakoku Seclusion Edicts of isolationism in 1614. Nanban (南蛮, "Southern barbarian") is a Japanese word borrowed from Chinese Nanman, which had been used to designate people from Southern China, the Ryukyu Islands, the Indian Ocean, and Southeast Asia centuries prior to the arrival of the first Europeans. For instance, according to the Nihon Kiryaku (日本紀略), Dazaifu, the administrative center of Kyūshū, reported that the Nanban (southern barbarian) pirates, who were identified as Amami islanders by the Shōyūki (982–1032 for the extant portion), pillaged a wide area of Kyūshū in 997. In response, Dazaifu ordered Kikaijima (貴駕島) to arrest the Nanban.
The Nanban trade as a form of European contact began with Portuguese explorers, missionaries, and merchants in the Sengoku period and established long-distance overseas trade routes with Japan. The resulting technological and cultural exchange included the introduction of matchlock firearms, cannons, galleon-style shipbuilding, and Christianity to Japan, among other cultural aspects. The Nanban trade declined in the early Edo period with the rise of the Tokugawa Shogunate which feared the influence of Christianity in Japan, particularly the Roman Catholicism of the Portuguese. The Tokugawa issued a series of Sakoku policies that increasingly isolated mainland Japan from the outside world and limited European trade to Dutch traders on the artificial island of Dejima, under total scrutiny.

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