Japanese symbol for “triangles”

三角定規

さんかくじょうぎ

Romaji: sankakujougi

triangles (used in mechanical drawing); set square

In Japanese, triangles is 三角定規, read さんかくじょうぎ (sankakujougi).

Before using these characters for a tattoo, check them with a native speaker. Dictionary words often have several meanings, and the right choice depends on context.

Meanings

n triangles (used in mechanical drawing); set square

Kanji and stroke order

三

three

on: サン、ゾウ
kun: み、み.つ、みっ.つ

3 strokes · JLPT 4

角

angle, corner, square

on: カク
kun: かど、つの

7 strokes · JLPT 2

定

determine, fix, establish

on: テイ、ジョウ
kun: さだ.める、さだ.まる、さだ.か

8 strokes · JLPT 2

規

standard, measure

on: キ

11 strokes · JLPT 2

Related words

Words that share a kanji.

Word	Reading	Meaning
三つ	みっつ mittsu	three
三角	さんかく sankaku	triangle; triangular shape
第三者	だいさんしゃ daisansha	third party; third person; outsider
再三	さいさん saisan	again and again; repeatedly
三角形	さんかくけい sankakukei	triangle
三振	さんしん sanshin	strikeout
角度	かくど kakudo	angle
多角	たかく takaku	many-sided; versatile; polygonal
予定	よてい yotei	plans; arrangement; schedule
規模	きぼ kibo	scale; scope; plan

Data: JMdict (CC BY-SA 4.0); KANJIDIC2 (CC BY-SA 4.0); KanjiVG (CC BY-SA 3.0); wordfreq (CC BY-SA 4.0 (data)). Retrieved 2026-10-22.