Translation guide
A guide to expressing the English conjunction 'unless' in Japanese, covering conditional patterns, negative conditions, and common pitfalls.
Express a condition that must be met to avoid a negative outcome, equivalent to 'if not'.
Unless you hurry, you'll be late.
Unless it rains, we'll go on a picnic.
A conditional form meaning 'if not'. Often used in everyday speech. It can translate 'unless' when the result is undesirable if the condition is not met. More casual than 〜ない限り.
Unless we leave early, we won't make it.
A colloquial conditional meaning 'if not', often implying a negative consequence. Very common in casual conversation. The result clause is often omitted if obvious.
Unless you study, you'll fail the exam.
Unless we hurry! (We'll be late!)
Introduce an exception to a general statement, similar to 'except when' or 'except if'.
Means 'except for' or 'other than'. Used to state that something is true in all cases except the one mentioned. Often followed by a negative or positive statement.
Unless it's an emergency, please don't call here.
A more formal way to say 'except in the case of'. Suitable for written instructions or official contexts.
Express that something will happen only under a specific condition, often phrased as 'unless' in English but with a positive condition in Japanese.
Means 'only after/once' or 'not until'. Used when the result occurs only after the condition is fulfilled. Often translates English 'unless' when the meaning is 'only if'.
You won't understand the difficulty unless you actually try it.
A pattern meaning 'unless one does something, a negative result follows'. Emphasizes the necessity of the action. Often paired with a negative potential form or negative outcome.
There is no single Japanese word that directly corresponds to 'unless'. Using a dictionary form like 'unless = 〜を除いて' without proper grammar will sound unnatural. Always use a conditional pattern like 〜ない限り or 〜なければ.
Unless it rains, I'll go.
〜ない限り is the most precise equivalent of 'unless' and works in both formal and informal contexts. 〜なければ is a general conditional 'if not' and is slightly more casual. 〜ないと is very colloquial and often implies urgency or a negative consequence. Choose based on formality and emphasis.
In questions, 'unless' can often be rephrased as 'if not' in Japanese. For example, 'Why would you go unless you have to?' can become '行かなければならないのでなければ、なぜ行くの？' (If you don't have to go, why go?).
Unless you have a better idea, let's go with my plan.
I won't go unless you come with me.
Unless you have permission, photography is prohibited.
Unless I study more, I can't pass.