階 — “floor / story” in Japanese

Grade 3かい

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“floor / story” in Japanese is 階, read kai (かい). It is a Grade 3 Kyōiku kanji, taught in year 3 of Japanese elementary school, and appears in words such as 二階 (second floor).

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What does 階 mean?

Full details, readings & example

Kanji	階
Meaning	floor / story
Readings	かい
Grade	Grade 3 (Medium)
Curriculum	Kyōiku kanji · Japanese elementary school
Example	二階 (second floor)

How to read 階

階 is read kai (かい) depending on the word.

Words with 階

二階
階層
段階

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Kanji read the same way as 階

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Updated: 2026-08-28