下階 かかい Meanings Noun floor below; floor downstairs See also: 上階 (じょうかい). Kanji 下 down. Read as カ. 階 floor. Read as カイ. Example sentences 下階で誰かがあなたを待っていますよ。Someone is waiting for you downstairs. Words containing 下階 最下階 (さいかかい) bottom floor 地下階 (ちかかい) basement floor Jinuma: Japanese Dictionary · Word lists