日本历史上作为防御敌人进攻用的广义的“城”，包括城墙、壕沟、栅栏以及炮台，曾有２５０００多个，其中被称为“城郭”的，即城堡式的建筑大部分是在日本战国末期至安土桃山时代和江户初期的半个世纪中修建的。这一时期是日本筑城史上最为兴盛的时代，全国各地林立着大小３? In the history of Japan, as a generalized “city” for attacking the enemy, there were more than 25,000 “cities,” including the city walls, moats, fences and forts. Of these, there were more than 25,000, of which the castle-type buildings were mostly in the Japanese Warring States Built in the late Aru Momoyama era and half a century from the beginning of Edo. This period is the most prosperous era in the history of Japanese fortification, all over the country lined with size 3?