Japanese symbol for “otr”

酸素透過率

さんそとうかりつ

Romaji: sansotoukaritsu

oxygen transmission rate; OTR

In Japanese, otr is 酸素透過率, read さんそとうかりつ (sansotoukaritsu).

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

exp oxygen transmission rate; OTR

Kanji and stroke order

酸

acid, bitterness, sour

on: サン
kun: す.い

14 strokes · JLPT 1

素

elementary, principle, naked

on: ソ、ス
kun: もと

10 strokes · JLPT 1

透

transparent, permeate, filter

on: トウ
kun: す.く、す.かす、す.ける、とう.る

10 strokes · JLPT 1

過

overdo, exceed, go beyond

on: カ
kun: す.ぎる、す.ごす、あやま.ち、あやま.つ

12 strokes · JLPT 2

率

ratio, rate, proportion

on: ソツ、リツ、シュツ
kun: ひき.いる

11 strokes · JLPT 2

Related words

Words that share a kanji.

Word	Reading	Meaning
酸素	さんそ sanso	oxygen (O)
酸化	さんか sanka	oxidation; oxidization
炭酸	たんさん tansan	carbonic acid
酸性	さんせい sansei	acidity
硫酸	りゅうさん ryuusan	sulfuric acid; sulphuric acid
酸味	さんみ sanmi	sourness; acidity
要素	ようそ youso	element; component; factor
素材	そざい sozai	ingredient; (raw) material; resource
透明	とうめい toumei	transparent; clear
過去	かこ kako	the past; bygone days
効率	こうりつ kouritsu	efficiency

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.