The fortress was first attacked Attack in August 1338 by a small force under Nitta Yoshisada , numbering roughly fifty horse , in what would come to be known as the battle of Fujishima .

Hosokawa Akiuji had been ordered Request by Ashikaga Takauji to aid Shiba Takatsune in the defense , and encountered Hostile_encounter Nitta 's force a short distance from the fortress .

The warrior monks of the Heisen-ji monastery , originally part of Nitta 's force , were bribed Committing_crime by Shiba to abandon GiveUp the attack Attack , and Nitta 's rush to fill the ensuing gap in his formations led to him and his horsemen running into Hosokawa 's .

The warrior monks of the Heisen-ji monastery , originally part of Nitta 's force , were bribed Committing_crime by Shiba to abandon GiveUp the attack Attack , and Nitta 's rush to fill the ensuing gap in his formations led to him and his horsemen running into Hosokawa 's .

In the battle which followed , Nitta was mortally wounded Bodily_harm by an arrow .

The following year , upon his enthronement , Emperor Go-Murakami ordered Request the late Nitta 's brother , Wakiya Yoshisuke , to lead another attack Attack on the fortress .