空くう中ちゅう楼ろう閣かくくうちゅうろうかくじ字FuriganaMeanings1nouncastle in the air; pipe dream; unrealistic planyojijukugo (four-character idiom)›Refers to an impractical, fanciful idea or plan that is unlikely to be realized. Often used in critical or dismissive contexts.彼かれの計けい画かくは所しょ
