Depending on the region, various devices in nawabari (castle plan; general term for the layout of a castle and its component structures) are seen such as kuruwa umadashi (walls of a Japanese castle and it refers to one of the types of the arrangement of a defensive territory around the castle) that is mainly seen in castles in the territory of the Takeda clan in the Kai Province and which is used as a base for interception and shootings, supplementing each other, moat of horijiro (castle surrounded by a moat) for controlling the route of invasion of opponents which is mainly seen in castles in the territory of the Gohojo clan in the Kanto district or in the northern part of Kyushu, and castles with many yagura and boro (watch tower) used as bases for shooting, which are mainly seen in Kinai, in which a large number of matchlock guns were traded.
甲斐国武田氏領内における城を中心として見られる迎撃と射撃が補完しあう拠点としての曲輪馬出や、関東地方の後北条氏領内や九州北部地域の城を中心として見られる敵の侵攻経路を管制する堀城の堀、あるいは、火縄銃が多く流通した畿内を中心として見られる射撃拠点としての矢倉や望楼を多く伴う城など、地域ごとにさまざまな縄張りへの工夫が見られる。