The Tokyo Imperial Palace (皇居, Kōkyo, literally "Imperial Residence") is the primary residence of the Emperor of Japan. It is a large park-like area located in the Chiyoda ward of Tokyo and contains buildings including the main palace, the private residences of the Imperial Family, an archive, museums and administrative offices. It is built on the site of the old Edo Castle. The total area including the gardens is 1.15 square kilometres (0.44 sq mi). During the height of the 1980s Japanese property bubble, the palace grounds were valued by some to be more than the value of all of the real estate in the state of California.