Japanese symbol for “bos”

境界内オブジェクト集合

きょうかいないオブジェクトしゅうごう

Romaji: kyoukainaiobujekutoshuugou

bounded object set; BOS

In Japanese, bos is 境界内オブジェクト集合, read きょうかいないオブジェクトしゅうごう (kyoukainaiobujekutoshuugou).

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 bounded object set; BOS (comp)

Kanji and stroke order

境

boundary, border, region

on: キョウ、ケイ
kun: さかい

14 strokes · JLPT 2

界

world, boundary

on: カイ

9 strokes · JLPT 3

内

inside, within, between

on: ナイ、ダイ
kun: うち

4 strokes · JLPT 2

集

gather, meet, congregate

on: シュウ
kun: あつ.まる、あつ.める、つど.う

12 strokes · JLPT 3

合

fit, suit, join

on: ゴウ、ガッ、カッ
kun: あ.う、-あ.う、あ.い、あい-

6 strokes · JLPT 3

Related words

Words that share a kanji.

Word	Reading	Meaning
環境	かんきょう kankyou	environment; surroundings; circumstances
国境	こっきょう kokkyou	border (between countries); national border
境界	きょうかい kyoukai	boundary; border; limit
心境	しんきょう shinkyou	state of mind; mental state; mental attitude
境内	けいだい keidai	grounds (esp. of shrines and temples); compound; churchyard
境遇	きょうぐう kyouguu	one's circumstances; environment; situation (in life)
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
内容	ないよう naiyou	contents; content; substance
編集	へんしゅう henshuu	editing; compilation
場合	ばあい baai	case; occasion; situation

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.