凸 — “Convex / Beetle Brow / Uneven” in Japanese

Master (高手)とつ, でこ

Radical ⼐ · radical 17 The building block this kanji is filed under

“Convex / Beetle Brow / Uneven” in Japanese is 凸, read totsu, deko (とつ, でこ). It is a Jōyō kanji taught in Japanese secondary school (junior & senior high) — the 高手 · Master tier beyond the grade 1–6 Kyōiku set, and appears in words such as 凸凹 (uneven).

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What does 凸 mean?

Full details, readings & example

Kanji	凸
Meaning	Convex / Beetle Brow / Uneven
Readings	とつ, でこ
Grade	Master (高手 · secondary school)
Curriculum	Jōyō kanji · Japanese secondary school (JLPT N1–N2)
Example	凸凹 (uneven)

How to read 凸

凸 is read totsu (とつ) or deko (でこ) depending on the word.

Words with 凸

凸凹
凹凸

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Updated: 2026-08-28