Himeji Castle
Himeji Castle contains advanced defensive systems from the feudal period. in the shape of circles, triangles, squares, and rectangles are located throughout Himeji Castle, intended to allow defenders armed with tanegashima or archers to fire on attackers without exposing themselves. Roughly 1,000 loopholes exist in the castle buildings remaining today. Angled chutes called were also set at numerous points in the castle walls, enabling stones or boiling oil to be poured on the heads of attackers passing by underneath, and white plaster was used in the castle's construction for its resistance to fire.