noun
small projecting castle tower; outwork tower
Historical term for a small tower or bastion projecting from a larger castle's walls, used for defense and flanking fire. Primarily encountered in descriptions of Japanese castle architecture.
姫路城の出丸は、敵の側面を攻撃するために築かれた。
The projecting towers of Himeji Castle were built to attack the enemy's flanks.
この城跡には、かつて出丸があったと伝えられている。
It is said that there was once a projecting tower at these castle ruins.