castle

(slang) Alternative form of 大きいお友達

the emperor's residence, the imperial palace / the capital, especially within an empire

(historical) (Japanese colonial era) Seoul, also known as Gyeongseong (the Korean reading of these same Chinese characters) and Keijō

(obsolete) the emperor's residence, the imperial palace / (obsolete) the capital, especially within an empire

(historical) Hanseong (Seoul during the Joseon dynasty)

a place name, such as that of Uki City in Kumamoto Prefecture / a surname

siege

to besiege / to attack a city

Imperial palace