Japanese symbol for “bounded”

有界

ゆうかい

Romaji: yuukai

bounded

In Japanese, bounded is 有界, read ゆうかい (yuukai).

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

adj-na bounded (math)

Kanji and stroke order

有

possess, have, exist

on: ユウ、ウ
kun: あ.る

6 strokes · JLPT 3

界

world, boundary

on: カイ

9 strokes · JLPT 3

Related words

Words that share a kanji.

Word	Reading	Meaning
有る	ある aru	to be; to exist; to live
有名	ゆうめい yuumei	famous; well-known
所有	しょゆう shoyuu	possession; ownership
有効	ゆうこう yuukou	valid; effective
有料	ゆうりょう yuuryou	fee-charging; paid; not free
有利	ゆうり yuuri	advantageous; favourable; better
世界	せかい sekai	the world; society; the universe
業界	ぎょうかい gyoukai	business world; business circles; (the) industry

See also: Chinese symbol for “bounded”.

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.