下か階かいじ字FuriganaMeanings1nounfloor below; lower floorRefers to the floor directly beneath the current one, or a lower floor in a building. Often contrasted with 上階 (じょうかい, upper floor).See also: 上階下か階かいから物もの音おとが聞きこえる。I can hear a noise from the floor below.このビルの下か階かいは駐ちゅう車しゃ場じょうになっている。The lower floors of this building are used as a parking lot.