jan 1, 1633 - 1633—Shogunate Forbids Overseas Travel

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In 1633, Iemitsu cracked down on overseas travel. Foreign ships were only permitted to enter Nagasaki Harbor, and Japanese ships had to be certified to travel abroad. Two years later certification was revoked, and all of Japan's ships were forbidden to leave the country. Japanese seamen could no longer work on foreign ships; those who disobeyed were executed.

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