In addition, this castle was constructed as a fortress against an uprising of Ikko sect followers in Echizen Province and Kaga Province, because it was situated at the strategic point on the route from Hokuriku-kaido Road to the capital.
加えて北陸街道から京への要衝に位置していたことから、越前・加賀の一向一揆に備えるためでもあった。