holding a castle (during a siege);  holing up;  confinement (to one's home);  staying at home;  staying indoors
 impregnable castle;  inner castle citadel;  golden castle (nickname for Nagoya Castle)
 royal castle;  imperial castle
 inside of a castle;  area surrounded by castle walls
 land near a castle;  castle town
 castle town;  fortified town
 Edo Castle (residence of the Shogun during the Edo period, now the site of the Tokyo Imperial Palace)
 chamberlain;  castle keeper
 castle construction;  building a castle;  fortification
 castle site;  ruins of a castle
 fortress;  castle;  citadel;  enclosure;  castle walls
 Palace of the Dragon King;  palace from the story of Urashima Taro (said to be located at the bottom of the sea)
 nightless gay quarters;  nightless city
 great wall (of China);  long wall
 coming to a castle;  visiting a castle
 fine castle;  famous castle
 (possession of) one feudal domain and one castle;  being independent (acting without compromise or assistance);  establishing only one castle in each feudal domain (edict issued by the shogunate in 1615)
 enemy castle;  enemy fortress
 withdrawing from the castle
 imperial palace;  capital;  metropolis;  Keijō (name given to Seoul during the Japanese occupation)
 solitary castle;  isolated castle
 Imperial Palace (esp. from 1888 to 1946)
 Heijō-kyō (ancient name of Nara)
 Siege of Chihaya (Genkō War; 1333)