茨城県[ibarakiken] Ibaraki prefecture (Kantou area)
王城[oujou] royal castle
下城[gejou] withdrawing from the castle
牙城[gajou] stronghold (esp. of an enemy or opponent)
開城[kaijou] capitulation (of fort)

宮城[kyuujou] Imperial Palace
宮城県[miyagiken] Miyagi prefecture (Tohoku area)
傾城[keisei] beauty
堅城[kenjou] strong fortress
古城[kojou] old castle

迦楼羅[karura] Garuda or Garua (man-bird deity and 'vahana' of Hindu-Buddhist myth)
画楼[garou] high decorated building
空中楼閣[kuuchuuroukaku] castle in the air
高楼[kourou] lofty (high) building
鐘楼[shourou] belfry

摩天楼[matenrou] skyscraper
楼閣[roukaku] multistoried building
楼門[roumon] two-storied gate
蜃気楼[shinkirou] mirage
望楼[bourou] watchtower