“Upper floor” in Japanese
Short answer
Upper floor in Japanese is “階上” (kaijou). Full meaning: upper floor, upstairs; top of the stairs.
Other ways to say “Upper floor” in Japanese
高層階
kousoukai upper floor (of a high-rise building)
上層階
jousoukai upper floor (of a building)
楼上
roujou on top of a tall building, balcony, upper floor
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