城下町【じょうかまち】
castle town, city in Japan that developed around the castle of a feudal lord
古城【こじょう】
old castle, old fortress
城主【じょうしゅ】
lord of a castle
開城【かいじょう】
surrender of a castle, surrender of a fortress, capitulation of a stronghold
城郭【じょうかく】
castle, citadel, fortress, castle walls, enclosure