The ruins of Nakagusuku Castle face the Pacific, overlooking Nakagusuku Bay and located on a plateau of Ryukyuan limestone approximately 150 meters in elevation

The ruins consist of six enclosures, with the main gate on the west side and a rear gate built in the back. Entering the Gusuku through the main gate, the first long and narrow wall of the western enclosure stretches out. This area was used in ancient times to conduct cavalry drills. Going down to the left side of the western enclosure there is a well. Opposite the well and passing through the left hand stone gate there is a place thickly covered by foliage where prayers are offered.

It is an Utaki, or sacred grove, where prayers for rain were once offered up to faraway Shuri and sacred Kudaka Island. The whole of the southern stone wall enclosure includes this sacred grove. In the ramparts of the southern enclosure are openings for firing through the walls in the event the castle became a battle zone.

Progressing toward the back, the southern enclosure passes through the first, second, and third stone wall enclosures, with the third going into the northern enclosure. Moving onto the small open space with an arch in the southern walls and onto the first enclosure is the highest location in the whole of the ruins, once the widest of the stone wall enclosures. The main house of the historical Aji chieftains was probably built here.

From this wall the second enclosure is reached by going through the stone gate. The gate to the third enclosure is not existent. Entrance into the third enclosure is structured so it goes once into the northern enclosure, where one must pass a flight of stone steps. Masonry on the ramparts that surround the third enclosure is characterized by the large-sized stones used; these were part of another castle wall. While there is "Nunodzumi" coursed masonry used in other walls, the one here used the "Aikata" fitted masonry technique for construction. This is assumed to be due to differences in the age of construction. This is where the strong opinion that Gosamaru enlarged the castle wall when he relocated to Zakimi Castle comes from. This is given credence by the fact that the same techniques were used in Gosamaru's construction of Zakimi Castle.