The 1581 siege of Hijiyama (比自山城の戦い, hijiyama-jō no tatakai) was one of the crucial battles in Oda Nobunaga's campaigns to seize Iga province during Japan's Sengoku period.
The defensive force rose from those villages and gathered at the fortress, some preparing an ambush halfway up the hill.
Gamō and Tsutsui launched their assault at night, pressing up the hill and meeting fierce resistance before being pushed back entirely by the ambush.
When Gamō and Tsutsui attacked the fortress once more, they found the weather to be perfect for setting the entire complex ablaze.
Wind from the mountains and dry weather combined to fan the flames and spread them across the wooden stockades, destroying the entire fortress, along with the nearby Hachiman Shintō shrine.