Further more, there were different systems of ancient castles: Miyakonojo (a capital or a city surrounded by castle walls), Kokufu-jo castle, sekisho (checking station), a fort, Mizushiro, a josaku (an official defense site) and Chinju-fu (Pacification and Defense Headquarters) in Tohoku and Hokuriku regions, and Jokan (a castle of mansion-style).
また、別系統の古代城郭に都城、国府城、関所、要害、水城、東北・北陸の城柵・鎮守府城、城館などがある。