Osaka Castle (大坂城 or 大阪城, Ōsaka-jō) is a Japanese castle in Chūō-ku, Osaka, Japan. The castle is one of Japan's most famous and it played a major role in the unification of Japan during the sixteenth century of the Azuchi-Momoyama period.
The main tower of Osaka Castle is situated on a plot of land roughly one square kilometer. It is built on two raised platforms of landfill supported by sheer walls of cut rock, using a technique called Burdock piling, each overlooking a moat. The central castle building is five stories on the outside and eight stories on the inside, and built atop a tall stone foundation to protect its occupants from attackers.
The castle is a concrete reproduction (including elevators) of the original and the interior is intended as a modern, functioning museum.
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