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階数 (かいすう) Japanese meaning | Kotomora

階かい数すう

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Freq.FrequencyTop 100,000

Meanings

1

noun

number of floors; number of stairs

Refers to the count of floors in a building or the number of steps in a staircase. Common in architectural or everyday contexts.

このビルの階かい数すうは何なん階がいですか。
How many floors does this building have?
階かい段だんの階かい数すうを数かぞえてみた。
I tried counting the number of stairs.

2

Kanji

階storey, stair, counter for storeys of a building
数number, strength, fate

Similar words

階かい
階 is a counter for floors (e.g., 3階 = third floor), while 階数 refers to the total number of floors.
段だん数すう
段数 is used for the number of steps or levels in a staircase or tiered structure, but 階数 can also refer to the number of stairs in a staircase.

Etymology

Compound of 階 (floor, storey) and 数 (number). The mathematical sense is a direct extension of the 'number of levels' concept.

noun

mathematics

Mathematical term for the order or rank of a matrix, tensor, or similar structure. Not used for social rank.

行ぎょう列れつの階かい数すうを求もとめる。
Find the rank of the matrix.