The , or `` Black Fortress '' , was a fortress of the `` Kanrei '' Shiba Takatsune located in Echizen Province ( present-day Nittazuka , Fukui , Fukui Prefecture ) in the Hokuriku region of Japan .

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 .

This assault was successful , and ended Process_end in Shiba 's surrender .