With respect to construction, on the east and south sides of the castle tower facing outside the castle, there are 2 tiers of gables where bay windows and ledges are present in addition to oillets instead of windows.
城外側にあたる東・南面には切妻破風を2重に重ねて出窓や出張を設け、窓の代わりに矢狭間を用いた構えである。