1630s
From Tardis Wiki, the free Doctor Who reference
In the third decade of the 17th century, the 1630s, the Takogawa shogunate which ruled Japan implemented the policy of Sakoku, isolating the country from the rest of the world due to a suspicion of Westerners and the spread of Christianity into Asia. Japan's era of seclusion lasted until the mid-19th century. (AUDIO: The Barbarians and the Samurai)
