noun
perpetual land lease
A legal term for a perpetual leasehold right over land, used in historical or specialized legal contexts.
永子作権は、旧民法下で認められていた永代の土地賃借権です。
Eikosakuken is a perpetual land lease right recognized under the old Civil Code.
永小作権 is a more common variant or related term for perpetual leasehold; 永子作権 may be an older or less common spelling.
Compound of 永 (perpetual), 子 (child, but here likely a phonetic or historical element), 作 (cultivation/lease), and 権 (right). The exact derivation is uncertain; it is a specialized legal term.