Rangaku

Early modern study of Dutch learning in Japan

Rangaku, and by extension Yōgaku , 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 (sakoku).

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