Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. architectural elements
7. [architectural elements by building type]
8. fortification elements
9. [defensive walls and defensive wall components]
10. defensive walls

Anotations

Scope note:

Main fortified areas of Japanese castle complexes, literally "main circles", that contained the "tenshu". These areas were the most protected parts of the castle and, in some cases, were used as the residences of the castle owners during wartime.