# 系 — lineage; system

系 means “lineage; system”. It is a JLPT N1 kanji written with 7 strokes. On'yomi: ケイ (kei). It has no common kun'yomi. You'll see it in words such as 系 (kei, “system; lineage”).

- Meaning: lineage; system
- On'yomi: ケイ (kei)
- Kun'yomi: —
- Strokes: 7
- Level: JLPT N1 · set Links & order 1

## How to remember 系

Parts: 丿 slash · 糸 thread

## Words with 系

| Word | Reading | Meaning |
| --- | --- | --- |
| 系 | けい (kei) | system; lineage |

## Don't confuse it with

[係](https://moji.ninja/n3-kanji/person-in-charge/) · [級](https://moji.ninja/n3-kanji/class/) · [孫](https://moji.ninja/n2-kanji/grandchild/) · [糸](https://moji.ninja/n3-kanji/thread/)

## More in the “Links & order 1” set

[及](https://moji.ninja/n1-kanji/extend-to/) · [系](https://moji.ninja/n1-kanji/lineage/) · [継](https://moji.ninja/n1-kanji/inherit/) · [伴](https://moji.ninja/n1-kanji/accompany/) · [属](https://moji.ninja/n1-kanji/belong/) · [却](https://moji.ninja/n1-kanji/on-the-contrary/) · [併](https://moji.ninja/n1-kanji/combine/) · [括](https://moji.ninja/n1-kanji/tie-up/)

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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/lineage/. Last updated 2026-11-01.