Translation guide
In Japanese, expressing 'guessing' depends on certainty, evidence, and formality. Common strategies include using 〜だろう/でしょう for conjecture, 〜かもしれない for possibility, 〜と思う for personal opinion, and 〜はず for expectation based on reasoning.
I guess so. (polite)
The speaker makes a guess about something, often without strong evidence. This is the most common way to say 'I guess' or 'probably'.
Plain form conjecture, used in casual speech and writing. Attaches to the plain form of verbs, adjectives, and nouns. Often translated as 'probably' or 'I guess'.
It will probably rain tomorrow.
He probably won't come.
Polite form of 〜だろう. Used in formal speech and writing. Slightly softer than 〜だろう.
It will probably rain tomorrow.
Literally 'I think that...'. Used to express personal guess or opinion. Less assertive than 〜だろう/でしょう. Often used with 多分 (たぶん, probably).
Expresses possibility, 'might' or 'may'. Weaker certainty than 〜だろう. Can be shortened to 〜かも in casual speech.
He might come.
Expresses a feeling or hunch, 'I have a feeling that...'. Softer and more intuitive than 〜と思う.
I have a feeling I forgot something.
The speaker makes a logical inference or expects something based on information. Equivalent to 'should' or 'ought to'.
Indicates expectation based on reasoning, 'should' or 'ought to'. The speaker is fairly certain. Negative form is 〜はずがない (cannot be).
Asking for someone's guess or opinion, or making a tentative suggestion.
Casual sentence-ending particle expressing wonder or asking oneself. Often used when thinking aloud or seeking confirmation. 'I wonder...'
The speaker gives an approximate number or amount, or makes a rough calculation.
〜だろう expresses a guess with moderate certainty (probably). 〜かもしれない expresses possibility (might). 〜はず expresses expectation based on logic (should). Choose based on how sure you are and the basis for your guess.
He'll probably come. (guess)
彼は来ないでしょう。
He probably won't come.
I think he'll probably come.
I think that's true.
雨が降るかも。
It might rain.
He should have arrived by now.
That can't be true.
Strong conviction, 'must be' or 'no doubt'. More emphatic than 〜はずだ. Often used when the speaker is convinced.
He must be lying.
Expresses conjecture based on sensory evidence or observation, 'it seems' or 'it looks like'. Similar to 〜みたいだ but more formal.
It seems someone has come.
Casual equivalent of 〜ようだ. Used in spoken Japanese for 'it seems like' or 'it looks like'.
It looks like it rained.
I wonder if it will be sunny tomorrow.
I wonder if this is okay.
Feminine equivalent of 〜かな. Used mostly by women in casual speech. 'I wonder...'
I wonder if this is okay.
Polite way to ask for a guess or confirmation. Often used in formal settings or customer service.
Do you think it will be sunny tomorrow?
Noun meaning 'guess', 'conjecture', or 'speculation'. Often used in formal contexts. Verb form: 推測する.
That's just a guess.
A wild guess, shot in the dark. Implies guessing without any basis.
I answered with a wild guess.
To make an educated guess or estimate. Literally 'to attach an aim'.
Please give me a rough estimate of the cost.
彼は来るかもしれない。
He might come. (possibility)
He should come. (expectation)
English 'I guess' often softens a statement or shows reluctance. In Japanese, using 〜だろう or 〜と思う can sound too direct if overused. Sometimes it's better to use softer expressions like 〜かな or 〜気がする, or simply omit the guessing phrase and use a rising intonation.
I guess so. (with uncertainty)