noun
branch-twined hedge to keep out wild boars and deer
Historical agricultural fence made of intertwined branches, typically erected around fields to prevent crop damage by wild boars and deer. Now mostly encountered in historical or ethnographic contexts.
江戸時代の農村では、鹿垣を巡らせて畑を獣から守った。
In Edo-period farming villages, they surrounded fields with shishigaki to protect crops from wild animals.
noun
Military term for a defensive obstacle made of felled trees with sharpened branches facing the enemy. This sense is a specialized extension of the original agricultural fence, used in fortification contexts.
城の周囲には鹿垣が設けられ、敵の侵入を阻んだ。
An abatis was set up around the castle to hinder enemy intrusion.
Compound of 鹿 (shishi, 'deer' or 'wild boar') and 垣 (kaki, 'fence'). The reading shishi is an old word for game animals, especially deer and boar. The exact historical derivation is uncertain, but the term clearly describes a fence for keeping out such animals.