lord of a castle; castle lord
Historical term for the feudal lord who owned and ruled a castle. Still used in historical contexts and for modern castle owners or managers.
The lord of this castle was a daimyo in the Warring States period.
The castle lord's family has ruled this land for generations.
He was the lord of Odawara Castle.
He won the battle and became the lord of that castle.
Nowadays a tourism officer serves as the castle's 'lord'.
領主 is a lord who governs a territory or manor, while 城主 is specifically the lord in charge of a castle.
城 means the castle itself, while 城主 refers to the person who owns or rules that castle.
Compound of 城 (castle) and 主 (master, lord).