The major style of castles were Hirayamajiro (castles built on a hill in a plain) whereas Kuruwa (walls of a castle) styles included Renkaku style (second compound and third compound surround the main compound at the center), Teikaku style (main compound is placed adjacent to the castle walls, and additional walls are placed surrounding the main compound), and Rinkaku style (the second compound and third compound surround the main compound at the center).
また、築城の形体はほとんど平山城であるが、曲輪の形態としては連郭式、梯郭式、輪廓式などがあった。