Bukseoporu (북서포루) is the northwestern sentry post. A gabled roof can be found on the interior while a hipped roof can be found on the exterior.
Bukseoporu consists of a wooden structure built above a chiseong or square turret.
There are five sentry posts at the Fortress. The posts are all constructed of brick and are positioned on turrets that protrude beyond the fortress walls. This position allowed for easy attacks by artillery on enemies below.
Construction was completed on September 24, 1794.