Sanjukken Nagaya

This two-story turret is an Important National Cultural Asset together with the Ishikawa-mon gate.
It was constructed in 1858, and it is approximately 50 meters long.
It is constructed on a stone wall made in a sophisticated "Kirikomi-hagi" style, it has "Namako Kabe," or the Sea Cucumber wall, and the roof is covered with lead tiles.