Fief

That daimyo holds a fief yielding 100,000 koku of rice.

Source: tatoeba (326823)

Sark is part of the English Channel Islands off the coast of Normandy, France. It is a royal fief, part of the Bailiwick of Guernsey, and has its own set of laws based on Norman law, its own parliament, and exchequer.

Source: tatoeba (12121532)

Unlike feudalism, technofeudalism is not about the ownership of farmland, but rather the virtual landscape comprising the sum total of all humans' attention spans. Instead of crops, a digital fief can be used to cultivate data and consumption.

Source: tatoeba (13523424)

Fief: m[asculine] A Fief. A (Knights) fee, a Mannor, or inheritance held by homage, and fealty; and given at the firſt, in truſt, and upon promiſe of aſſiſtance, or ſervice in the wars: […] Alſo, a Tenure, or Eſtate in fief, or in fee. This word was firſt heard of, after the conqueſt of Gallia by the Francs (or ancient French-men) when their Soveraign Princes, reſerving ſome land for their own Domains, diſtributed the reſt (by whole Countreys, or large territories) among their Captains, and principal followers, on condition, that they ſhould hold of them, and aid them in their wars […]

Source: wiktionary