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Tokyo Imperial Palace From Wikipedia, the free encyclopedia Tokyo Imperial Palace (皇居 Kōkyo, literally, "Imperial Residence") is the main residence of the Emperor of Japan. It is a large park-like area located in the Chiyoda area of Tokyo close to Tokyo Station and contains several buildings including the main palace (宮殿 (Kyūden), the private residences of the imperial family, an archive, museum and administrative offices. It is built on the site of the old Edo castle. The total area including the gardens is 3.41 square kilometres (1.32 sq mi). During the height of the 1980s Japanese property bubble, the palace grounds were valued by some as more than the value of all the real estate in the state of California.