rangaku

thumb|The Chinese characters (kanji) for "Rangaku". The first character "ran" is an abbreviation of the [[ateji for . The second character "gaku" means "study" and "learning".]] Rangaku (Kyūjitai: , ), and by extension , is a body of knowledge developed by Japan through its contacts with the Dutch enclave of Dejima, which allowed Japan to keep abreast of Western technology and medicine in the period when the country was closed to foreigners from 1641 to 1853 because of the Tokugawa shogunate's policy of national isolation (sa'koku). thumb|A meeting of Japan, China, and the West, Shiba Kōkan, late 18th century Through Rangaku, some people in Japan learned many aspects of the scientific and technological revolution occurring in Europe at that time, helping the country build up the beginnings of a theoretical and technological scientific base, which helps to explain Japan's success in its radical and speedy modernization following the forced American opening of the country to foreign trade in 1854.

==History== thumb|right|200px|Replica of an East Indiaman of the [[Dutch East India Company/United East Indies Company (VOC)]] thumb|200px|, Nishikawa Joken, 1708. [[Tokyo National Museum]] The Dutch traders at Dejima in Nagasaki were the only Europeans tolerated in Japan from 1639 until 1853 (the Dutch had a trading post in Hirado from 1609 till 1641 before they had to move to Dejima), and their movements were carefully watched and strictly controlled, being limited initially to one yearly trip to give their homage to the shōgun in Edo. They became instrumental, however, in transmitting to Japan some knowledge of the Industrial and Scientific Revolution that was occurring in Europe: In 1720 the ban on Dutch books was lifted and the Japanese purchased and translated scientific books from the Dutch, obtained from them Western curiosities and manufactures (such as clocks, medical instruments, celestial and terrestrial globes, maps and plant seeds) and received demonstrations of Western innovations, including of electrical phenomena, as well as the flight of a hot air balloon in the early 19th century. While other European countries faced ideological and political battles associated with the Protestant Reformation, the Netherlands were a free state, attracting leading thinkers such as René Descartes.