Dongnamgakru

The Dongnamgakru was situated in a corner of the wall on a hill next to the eastern Suwon stream, and therefore best suited for observing the enemy and defending the Namsumun. It could be used to direct the army as it faced the Dongbuk Gongsimdon .

The Dongnamgakru has a similar structure to the Seobuk Gangnu. However, all four rooms have wooden flooring, and the lower room has a staircase. To the southwest of the building is a stone heated room.