is a
Japanese castle in
Chūō-ku,
Osaka,
Japan. Originally called Ozakajo, it is one of Japan's most famous castles, and played a major role in the unification of Japan during the sixteenth century of the
Azuchi-Momoyama period.The 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, 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.
See more at Wikipedia.org...