口 — mouth / opening

Grade 1こう, く, くち

Radical ⼝ · radical 30 The building block this kanji is filed under

口 (readings: こう, く, くち; Japanese kanji) means “mouth / opening”. It is a Grade 1 Kyōiku kanji, taught in year 1 of Japanese elementary school, and appears in words such as 入口 (entrance).

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What does 口 mean?

Full details, readings & example

Kanji	口
Meaning	mouth / opening
Readings	こう, く, くち
Grade	Grade 1 (Easiest)
Curriculum	Kyōiku kanji · Japanese elementary school
Example	入口 (entrance)

How to read 口

口 is read こう or く or くち depending on the word.

Words with 口

人口じんこうdân số
入口lối vào
出口lối ra
口笛huýt sáo
窓口quầy

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Updated: 2026-08-09