The castle was built on about one square kilometer (less than a mile squared) of land, with two raised platforms supported by sheer walls of cut rock and surrounded by a moat. The central building is five stories outside, and eight stories on the inside. The thirteen structures that make up the castle have be designated as Important Cultural Assets by the Japanese government.
Osaka Castle was nearly destroyed during WWII, when used as one of the largest military armories. A full restoration started in 1995, and by 1997, had been completely restored to it's Edo-era days. The current castle is a concrete reproduction of the original castle, with a modern museum within.
A highlight of a visit to the castle is its fine collection of historical displays, its gilt details, and the great views of the city from the observation deck.
The castle is surrounded by parklands, which puts on a fine display at cherry blossom time. Look up to see the castle’s eight roof dolphins, ornamental roof tiles and golden tigers.
Osakajokoen Station is another option, dropping you near the castle’s rear garden entrance.