1　Fence. Read ki (also written 城) in the ancient period. A palisade of stakes aligned at regular…

Also read hasama. A loophole or porthole made in the wall of the keep, tower, or parapet to allow a castle to…

Lit. "loophole distribution." The number of loopholes per two meter (one ken 間) interval in a castle. Also refers…

A village castle. A medieval castle built in a low-lying village. Typically furnished with defensive installations.

Also termed seirō yagura 井楼櫓. A watch tower. Seirō were built from the Muromachi to the early…

1　Also read ishimon. A gate made almost entirely of stone, seen especially in Okinawa Prefecture.…

Also written 石墻門. Lit. "stone wall gate." A gate with either single or triple arch-like openings in a wall made of stacked…

A grass-covered earthen embankment *doi 土居. The embankment is shaped like a…

Lit. "four quarters piling." Also termed masugatazumi 桝形積 (square measuring box piling), and chikei-no-…

Also read edajiro 枝城. Also hajō 端城. Lit. "branch castle." A fortification, other than the main castle…

The process of castle construction, from site selection to the layout of the compound. Early modern military technicians…

Also termed kakubori 角堀 (a moat with squared off ridges), or unebori 畝堀 (the general term for a furrowed…

1　Edo period towns used as a stopping place by the Tokugawa 徳川 shoguns when they traveled outside the city…

A defensive square projection in a castle wall on one side of the castle entrance *…

Also termed sōgawa 総河, sometimes written 総側 or 総川, sōguruwa 総郭, 総曲輪. The enclosure that surrounds a town…

The outer moat of a castle that has two or more moats. Generally, the inner slope, nearer the castle, is steep while the…

Also termed sōtō tenshu 層塔天守. A multi-storied castle tower. A technically advanced tower employing the same careful…

Also read kado-ishi 角石. Lit. "corner stone." Long, rectangularly-hewn stones laid horizontally at the corners of a…

Lit. "corner tail stone." The stone that butts against the rear face tomozura 友面 of the corner stone *…

A castle entrance barrier *umadashi 馬出, erected at the corner of an…

A corner tower. Also written 角櫓. A timber-framed tower set on the corner of a castle wall where two stone walls jut out. In…

Moats dug in open areas some distance from a castle, to hinder the advance of enemy forces.

A sacrificial compound constructed in front of a main compound. A camp used to launch an attacking force. When a force moves…

A loophole *sama 狭間 cut in a wall about chest high to a standing soldier.…

Lit. "confronting castle." Also termed mukaijiro 向城 (facing castle) and *tsukejiro…

Also termed tamon-zukuri 多聞造, tamon'yagura 多聞櫓 (many listen tower) and tamon nagaya 多聞長屋 (many…

A pounded earth embankment. It was made of layers of earth mixed with water, pounded down and allowed to harden. The wall…

Also read tachi. A small castle shiro 城 and/or a wealthy provincial residence *…

A vertical dry moat. Also read tatsubori; sometimes written 立堀, 竪濠. A dry moat *…

Lit. "ladder-shaped compound plan." Short for teikakushiki nawabari 梯郭式縄張. A plan that fortified a castle entrance…

Lit. "tower central pillar." A pillar found in the main structure of castles, sometimes used singly and sometimes in pairs.…

Also called tenshukaku 天守閣, tenshuyagura 天守櫓. Also written 天主, 殿主, and 殿守. The principal tower-like…

The independent raised foundation upon which the principal tower *tenshu 天守 was constructed.…

Also called jūgan 銃眼 (loophole). A gun loophole or gun port. An opening through which to shoot a firearm from…

Also termed nawadarumi 縄だるみ (slackened rope). A concave shaped stone wall with a curved surface that resembles a…

Also read sotojiro. An outer castle or fortification.

1　A separately enclosed fortification…

Also written 取出, 取手, 塞 also 寨. A small-scale fort, fortification, or stronghold. A structure built near the main castle or…

Also written 壷狭間. Large bamboo stalks that are cut in section, painted and placed in outer castle walls and in the walls of…

An intersection barrier. A single barrier that is constructed to defend two entrances to a castle that have been constructed…

1　A fortification built as a staging camp from which to attack an enemy's castle…

A moon viewing tower of the *yagura 櫓 type found at a number of castles. Also…

Also read tsumejiro 詰城, or written 爪城 or tsume-no-shiro 攻の城.

1　The castle…

Same as tsunagijiro or tsunagishiro 繋城.

1　A type of branch castle *…

A decoy wall, or pseudo-wall. A wall that was built so as to hang over an earthen embankment or stone wall of a castle. When…

Tower connected with a gate or another tower. Examples connected to gates include Hikone-jō Taikomon 彦根城太鼓門 in Shiga…