# 凸 — convex

凸 means “convex”. It is a JLPT N1 kanji written with 5 strokes. On'yomi: トツ (totsu). Kun'yomi: でこ (deko).

- Meaning: convex
- On'yomi: トツ (totsu)
- Kun'yomi: でこ (deko)
- Strokes: 5
- Level: JLPT N1 · set Shapes 3

## Don't confuse it with

[円](https://moji.ninja/n5-kanji/yen/) · [両](https://moji.ninja/n3-kanji/both/) · [再](https://moji.ninja/n3-kanji/again/)

## More in the “Shapes 3” set

[凸](https://moji.ninja/n1-kanji/convex/) · [斑](https://moji.ninja/n1-kanji/spot/) · [凹](https://moji.ninja/n1-kanji/concave/) · [弧](https://moji.ninja/n1-kanji/arc/) · [勾](https://moji.ninja/n1-kanji/gradient/) · [塑](https://moji.ninja/n1-kanji/model-in-clay/)

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