Osaka Castle (大阪城 Osaka-jō) is a classic style Japanese castle. It is Osaka’s best known sight and the symbol of the city. The castle is one of Japan‘s most famous, and 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 kilometer square. 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 sword-bearing attackers. The Castle grounds, which cover approximately 60,000 square meters (15 acres) contain thirteen structures which have been designated as Important Cultural Assets by the Japanese government. Osaka Castle is illuminated after dark making an outstanding sight which can be seen from a great distance.