出で城じろ

noun

branch castle; outlying fortification

Historical term for a satellite castle or fort built away from the main castle, often for defense or to control territory.

• 戦せん国ごく時じ代だいには、本ほん城じょうを守まもるためにいくつもの出で城じろが築きずかれた。

  During the Warring States period, many branch castles were built to protect the main castle.