Guides by Lonely Planet
Imperial Palace
The Imperial Palace occupies the site of the original Edo-jō, the Tokugawa shogunate's castle. In its heyday this was the largest fortress in the world, though little remains of it today apart from the moat and stone walls. Most of the 3.4-sq-km complex is off-limits, as this is the emperor's home, but you can join one of the free tours organised by the Imperial Household Agency to see a small part of the inner compound.
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