# 塞 — plug up; fort

塞 means “plug up; fort”. It is a JLPT N1 kanji written with 13 strokes. On'yomi: ソク (soku), サイ (sai). Kun'yomi: ふさ(ぐ) (fusagu). You'll see it in words such as 塞ぐ (fusagu, “to stop up; to close up”).

- Meaning: plug up; fort
- On'yomi: ソク (soku), サイ (sai)
- Kun'yomi: ふさ(ぐ) (fusagu)
- Strokes: 13
- Level: JLPT N1 · set Conflict & rivalry 7

## How to remember 塞

Parts: 宀 roof · 三 three · 八 eight; spreading legs · 土 earth

## Words with 塞

| Word | Reading | Meaning |
| --- | --- | --- |
| 塞ぐ | ふさぐ (fusagu) | to stop up; to close up |

## Don't confuse it with

[基](https://moji.ninja/n3-kanji/foundation/) · [寒](https://moji.ninja/n4-kanji/cold-weather/) · [演](https://moji.ninja/n3-kanji/perform/) · [寡](https://moji.ninja/n1-kanji/scant/)

## More in the “Conflict & rivalry 7” set

[禍](https://moji.ninja/n1-kanji/misfortune/) · [帥](https://moji.ninja/n1-kanji/commander-in-chief/) · [拷](https://moji.ninja/n1-kanji/torture/) · [斬](https://moji.ninja/n1-kanji/slash/) · [嚇](https://moji.ninja/n1-kanji/menace/) · [拉](https://moji.ninja/n1-kanji/take-away-by-force/) · [塞](https://moji.ninja/n1-kanji/plug-up/) · [毀](https://moji.ninja/n1-kanji/damage/)

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From Moji Ninja (https://moji.ninja/), a free app for learning hiragana, katakana and the JLPT kanji from N5 to N1 with spaced repetition. Page: https://moji.ninja/n1-kanji/plug-up/. Last updated 2026-11-01.