Readings: コウ (Onyomi), くち (Kunyomi)
Meaning: mouth, opening
The kanji 口 means “mouth” and is also used to represent openings or entrances. It frequently appears in basic words like 口 (mouth), 人口 (population), and 出口 (exit).
View JLPT N5 Kanji ListKanji Details
Radical | 口 (mouth) |
---|---|
Strokes | 3 |
JLPT Level | N5 |
Grade | 1st Grade |
Readings
Onyomi | コウ |
---|---|
Kunyomi | くち |
How to Write – Stroke Order
口 is a simple square shape representing an open mouth or opening. It is a very common radical in Japanese kanji.
- Draw the left vertical stroke first
- Then the top and right stroke in one motion
- Finish with the bottom horizontal line

Example Sentences
Japanese: 大きな口をあけてください。
Kana: おおきなくちをあけてください。
Romaji: Ookina kuchi o akete kudasai.
English: Please open your mouth wide.
Japanese: ここは出口です。
Kana: ここはでぐちです。
Romaji: Koko wa deguchi desu.
English: This is the exit.
Japanese: 東京の人口は多いです。
Kana: とうきょうのじんこうはおおいです。
Romaji: Toukyou no jinkou wa ooi desu.
English: Tokyo’s population is large.
Vocabulary Using 口
Word | Reading | Meaning |
---|---|---|
口 | くち | mouth |
人口 | じんこう | population |
出口 | でぐち | exit |
入口 | いりぐち | entrance |
口を開ける | くちをあける | to open one’s mouth |
🔗 N5 Grammar & Vocabulary

I’m a software engineer based in Japan, with experience in developing web and mobile applications. I’m passionate about technology, especially in DevOps, AI, and app development using platforms like AWS, Flutter, and Node.js. My goal is to build a website that shares knowledge about the Japanese language and IT, helping everyone learn and grow more easily in the digital era.