階上 かいじょう Meanings Noun upper floor; upstairs Antonym: 階下 (かいか). top of the stairs Antonym: 階下 (かいか). Kanji 階 floor. Read as カイ. 上 up. Read as ジョウ. Example sentences そのかばんを階上に運びなさい。Carry the bags upstairs. 彼はドアを閉めて、階上にあがった。He shut the door and went upstairs. Jinuma: Japanese Dictionary · Word lists