The 1573 Siege of Hikida Castle (疋壇城の戦い, Hikida-jō no Tatakai) was one of many battles the warlord Oda Nobunaga fought against the Azai and Asakura clans during Japan's Sengoku period. These two families were among the staunchest opponents of Nobunaga's attempts to seize land and power for himself.

In the year, 1573, Nobunaga besieged Odani castle, which was held by Azai Nagamasa. Asakura Yoshikage, leading a force to relieve and reinforce the Azai garrison. However, Nobunaga forces turn around to attack Yoshikage forces. Later, Yoshikage came under attack by Nobunaga's army, he sought refuge in Hikida Castle, and came under siege himself.^[1]

Hikida fell on August 10, and Asakura fled back to his home castle at Echizen province.