It seems that the castle had the following characteristics to prepare against the attacks by the enemy: The castle was constructed in the shape of cross braces with the construction methods of the Chinese-style yamajiro; several watchtowers are placed along the ridge of the mountain; facing the flat ground at the west foot of the mountain, the earth and stone mounds which were 10 meters high were stretched into 2 kilometers from south to north to strengthen the defense; and castle gates and sluice gates were built between the both ends of the mounds.
城の特徴は中国式山城の築城法でもってたすき状に築かれ、山の尾根づたいに望楼（物見やぐら）を配し、西麓の平地に面して高さ10メートル南北2キロメートルにわたる土塁・石塁をもって固め、その間に城門や水門等を造り、敵襲に備えたとみられる。