Miyagi surrounded by 12 meters high, long wall of 3400 meters, in the form of a rectangular city, outside the wall, 52 meters wide moat surrounded by a fortified castle barriers.

• 宫城周围环绕着高12米，长3400米的宫墙，形式为一长方形城池，墙外有52米宽的护城河环绕，形成一个森严壁垒的城堡。