It took 3.5 years to complete the donjon and entire castle. Unfortunately, the castle was short lived. After Nobunaga was killed by Akechi Mitsuhide in 1582 at Honnoji Temple, Azuchi Castle was burned to the ground in a battle between Nobunaga's second son Nobukatsu and Akechi's men who had taken over the castle.

The construction of Azuchi Castle was a revolution in castle design and marked the turning point in a new type of castle. Until this time, most were smaller mountaintop structures that were only used as a lookout or as needed. Nobunaga's Azuchi castle led the way for the larger and more grand structures of the late Sengoku Period and Early Edo Period turning castles in to quarters for the daimyo and some retainers.

The main donjon itself was 7 stories high and thought to have been the largest multi-storied wooden building in the world at that time. The fifth floor of the main keep was an octagon representing heaven and the quadrangular sixth floor represented the thoughts of Taoism and Confucianism.

The picture above is of the Ote-michi entrance through to the castle. Along either side were houses of loyal retainers.