|KEY WORD : architecture / castles|
| Lit. Square-shape mansion. A medieval fortified
military-class mansion that is surrounded by a square-shaped, or more commonly
rectangular-shaped, earthen embankment *doi
土居 and moat *hori 堀. The scale
of such mansions was about 110m （one chou 町） per side; large-scale scale mansions
were built to reflect the power of their military lords. Excavated evidence
demonstrates that many houkeiyakata ranged from 130m to 150m in length.
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