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

Anotations

Scope note:

The strongest and securist parts of Japanese castles, these tower-like structures were constructed both within other buildings and free-standing and were sometimes located within an inner compound called a "honmaru". They could exist alone or connected to other structures of the same type. For these types of fortification structures in western European castles, use "keeps".