# 洪 — flood

洪 means “flood”. It is a JLPT N1 kanji written with 9 strokes. On'yomi: コウ (kou). It has no common kun'yomi.

- Meaning: flood
- On'yomi: コウ (kou)
- Kun'yomi: —
- Strokes: 9
- Level: JLPT N1 · set Water & the sea 3

## How to remember 洪

Parts: 氵 water · 共 together

## Don't confuse it with

[共](https://moji.ninja/n3-kanji/together/) · [供](https://moji.ninja/n3-kanji/offer/) · [満](https://moji.ninja/n3-kanji/full/) · [昔](https://moji.ninja/n3-kanji/long-ago/)

## More in the “Water & the sea 3” set

[潤](https://moji.ninja/n1-kanji/moisten/) · [堤](https://moji.ninja/n1-kanji/embankment/) · [澄](https://moji.ninja/n1-kanji/clear-water/) · [洪](https://moji.ninja/n1-kanji/flood/) · [渦](https://moji.ninja/n1-kanji/whirlpool/) · [泡](https://moji.ninja/n1-kanji/bubble/) · [濁](https://moji.ninja/n1-kanji/muddy/) · [渇](https://moji.ninja/n1-kanji/thirst/)

---

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