竜宮城 りゅうぐうじょう Also written 龍宮城 Meanings Noun Palace of the Dragon King (i.e.: palace from the story of Urashima Taro (said to be located at the bottom of the sea)) See also: 竜宮 (りゅうぐう). Kanji 竜 dragon. Read as リュウ. 宮 palace. Read as グウ. 城 castle. Read as ジョウ. Jinuma: Japanese Dictionary · Word lists