Translation guide
The English word "positive" covers several distinct meanings. This guide helps learners choose the right Japanese expression for each meaning, from expressing certainty and optimism to describing test results and attitudes.
Expressing that you are certain about a fact or answer.
Used when you are fairly sure but not 100% certain. Often used as '確か〜だと思う' (I think it's ~).
確か、会議は3時からだったと思います。
I'm positive the meeting was from 3 o'clock.
Expresses absolute certainty, like 'definitely' or 'absolutely'. Stronger than 確か.
Literally 'to have confidence'. Used when you are positive about your own knowledge or ability.
その答えには自信があります。
I'm positive about that answer.
Having a positive attitude or expecting good things.
Giving an affirmative answer or response.
Describing a result, review, or effect that is good or beneficial.
Indicating a positive result on a test, such as medical or pregnancy tests.
Taking positive action or making a constructive contribution.
A number or value that is greater than zero.
The mathematical term for 'positive' (as opposed to negative). Used in compounds like 正の数 (positive number).
Having a positive electrical charge.
All can translate 'positive' in the sense of optimistic. 前向き emphasizes a forward-looking, proactive attitude. ポジティブ is a casual loanword often used for personality. 楽観的 is more formal and implies an expectation of good outcomes, sometimes with a nuance of 'optimistic' as a trait.
Do not use ポジティブ for all meanings. For test results, use 陽性. For certainty, use 確か or 絶対. For affirmative answers, use 肯定的. Using ポジティブ in these contexts can sound unnatural or overly casual.
絶対に間違いない。
I'm positive it's not a mistake.
Describes a forward-looking, constructive attitude. Common for 'positive thinking'.
彼はいつも前向きだ。
He's always positive.
前向きに考えよう。
Let's think positively.
Loanword from English, very common in casual speech. Often used for personality or attitude.
もっとポジティブに生きたい。
I want to live more positively.
Means 'optimistic'. Slightly more formal than 前向き or ポジティブ.
彼は将来について楽観的だ。
He is positive about the future.
Means 'affirmative'. Used for responses, opinions, or attitudes that say 'yes'.
彼の返事は肯定的だった。
His reply was positive.
肯定的な意見をください。
Please give positive feedback.
Loanword for 'yes', used in specific contexts like voting or clear affirmative signals. Not a general translation.
投票はイエスが多かった。
The vote was mostly positive.
Means 'favorable' or 'sympathetic'. Used for reviews, reactions, or attitudes.
映画は好意的な評価を受けた。
The movie received positive reviews.
Means 'good' or 'favorable' for conditions, results, or relationships. Often used in formal contexts.
健康状態は良好です。
My health condition is positive.
Loanword meaning 'plus' or 'positive' as in beneficial. Common in business or casual talk.
この経験はプラスになった。
This experience was positive.
The standard term for a positive test result (medical, chemical, etc.).
検査の結果は陽性でした。
The test result was positive.
妊娠検査薬が陽性だった。
The pregnancy test was positive.
Also used for test results, especially in casual contexts or with COVID-19 tests.
コロナの検査でポジティブだった。
I tested positive for COVID.
Means 'proactive' or 'positive' in the sense of actively doing something. Very common.
彼女は積極的に発言した。
She spoke up positively.
積極的な参加をお願いします。
Please participate positively.
Can also be used for constructive actions, though it leans more toward attitude.
前向きな提案を出した。
He made a positive suggestion.
正の整数
positive integer
Commonly used in everyday math or finance, like 'plus'.
収支はプラスだった。
The balance was positive.
Refers to the positive electrode or anode.
陽極と陰極
positive and negative electrodes