This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

Readings

Kana: トツ、でこ
Romaji: totsu, deko
Kana
Romaji

Meanings

convex, beetle brow, uneven

Stroke Diagram

12345

Kanji Info

Stroke Count:  5
Radical Number:  2
Frequency:  2143
Grade:  8
Skip Pattern:  4-5-1
Korean Reading:  dol
Chinese Reading:  gu3
Unicode:  51f8
JIS:  464C

Indexes

Halpern Index: 3486
Nelson Index: 90
New Nelson Index: 443
Spahn Hadamitzky Index: 0a5.13
Four Corner Index: 7777.7
Guide to Remembering Index: 1667
Gakken Index: 1921
Japanese Names Index: 323
Daikanwanjiten Index: 1809
Daikanwanjiten Index and Page: 2.0174
Remembering the kanji Index: 34
Kanji Flashcards Index: 1086
Kodansha Compact Index: 175
Kanji in Context Index: 1921
1999 Kanji Learners Index: 2174
2013 Kanji Learners Index: 2928
French Remembering the Kanji Index: 34
Remembering the Kanji 6th Index: 34
Essential Kanji Index: 1882
Kodansha Kanji Index: 4298
Roo 2001 Kanji Index: 3675
Tuttle Kanji Cards Index: 1040

Words

(とつ)
convex
凹凸 (おうとつ)
unevenness; roughness; ruggedness
凸版印刷 (とっぱんいんさつ)
letterpress; relief printing
凸角 (とっかく)
convex angle
凸面 (とつめん)
convex surface; convex
(でこ)
brow; forehead; bump
凸凹 (でこぼこ、とつおう、だくぼく)
unevenness; roughness; ruggedness; inequality
お凸 (おでこ)
brow; forehead; prominent forehead; beetle brow; not catching anything (in fishing)
凸面鏡 (とつめんきょう)
convex mirror
凸坊 (でこぼう)
beetle-browed boy; mischief
Find More