空 — sky / empty

Grade 1くう, そら, あ

Radical ⽳ · radical 116 The building block this kanji is filed under

空 (readings: くう, そら, あ; Japanese kanji) means “sky / empty”. It is a Grade 1 Kyōiku kanji, taught in year 1 of Japanese elementary school, and appears in words such as 青空 (blue sky).

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What does 空 mean?

Full details, readings & example

Kanji	空
Meaning	sky / empty
Readings	くう, そら, あ
Grade	Grade 1 (Easiest)
Curriculum	Kyōiku kanji · Japanese elementary school
Example	青空 (blue sky)

How to read 空

空 is read くう or そら or あ depending on the word.

Words with 空

夜空よぞらbầu trời đêm
青空あおぞらtrời xanh
空港くうこうsân bay
空気くうきkhông khí
星空ほしぞらbầu trời sao
上空じょうくうtrên cao
空気中くうきちゅうtrong không khí
航空hàng không

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Updated: 2026-08-09