Translation guide
A phrase used to express uncertainty or to politely introduce a statement that might be incorrect. In Japanese, it is often expressed through sentence-ending particles, adverbs, or conditional phrases.
If I'm not mistaken, he's a doctor.
The speaker is not entirely sure about the information and wants to soften the statement or invite correction.
A common casual pattern that softens a statement by adding 'I think' with an explanatory tone. It implies you're not 100% sure.
I think it's going to rain tomorrow, if I'm not mistaken.
I think he's already gone home, if I'm not mistaken.
A casual phrase meaning 'isn't it?' or 'I think it might be...'. It expresses uncertainty and seeks agreement.
This is Tanaka's, if I'm not mistaken.
Used when you believe something should be the case based on your knowledge, but you're not entirely certain. Often followed by a confirmation-seeking tone.
The meeting should be at 3, if I'm not mistaken.
Literally 'I don't know if...', used to preface a statement you're unsure about. More explicit about uncertainty.
I'm not sure if this is correct, but I think you need to sign here, if I'm not mistaken.
An adverb meaning 'if I remember correctly' or 'if I'm not mistaken'. Often used at the beginning of a sentence.
If I'm not mistaken, he was a doctor.
Used in polite conversation to soften a statement that might be a correction or to show deference.
A polite way to say 'I think that...' with a sense of 'if I'm not mistaken'. The が softens the assertion.
I believe there is an error in this document, if I'm not mistaken.
A polite, indirect way to express an assumption or suggestion. It translates to 'isn't it that...?' or 'I wonder if...'.
This point might be the problem, if I'm not mistaken.
〜と思うんだけど is a general 'I think' with uncertainty. 〜はずだけど implies you have a reason to believe something (e.g., you were told, it's scheduled), but you're still open to correction.
I think he'll come, if I'm not mistaken.
He's supposed to come, if I'm not mistaken.
Avoid directly translating 'if I'm not mistaken' word-for-word. Phrases like 私が間違っていなければ are grammatically correct but sound overly literal and stiff in most conversations.