| term | pronunciation | English |
|---|
| 何階 | なんかい | what floor |
| ～階 | ～かい | counter for storeys of a building |
| 階段 | かいだん | stairs |
| 段階 | だんかい | gradation, grade, stage |
| 一階 | いっかい | one floor, first floor |
| 中産階級 | ちゅうさんかいきゅう | middle class, bourgeoisie |
| 二階 | にかい | second floor, upstairs |
| 二階建て | にかいだて | two-storied building |
| 位階勲等 | いかいくんとう | court rank and honors, court rank and honours |
| 現段階 | げんだんかい | present stage; current rank, present grade |
| 琉球音階 | りゅうきゅうおんかい | Okinawan scale (hemitonic pentatonic scale: do, mi, fa, so, ti) |
| 階 | かい | stories; counter for storeys and floors of a building |
| 階層 | かいそう | class, level, stratum, layer, hierarchy |
| 階級 | かいきゅう | class, rank, grade |