Translation guide
A guide to expressing the English conditional 'unless' in Japanese, covering common patterns, formal/written usage, and natural alternatives.
Express a condition where something will happen or be true except if a specific condition is met. Equivalent to 'if not'.
The most direct and common way to say 'unless'. Attach to the negative plain form of a verb, adjective, or noun + で. Used in both spoken and written Japanese.
急がない限り、間に合わないよ。
Unless you hurry, you won't make it.
Express 'unless' in formal writing, speeches, or official documents.
Also used in formal contexts. The go-to pattern for both spoken and written formal Japanese.
許可がない限り、入室は禁止です。
Unless you have permission, entry is prohibited.
Emphasize that something will happen only under a specific condition, or not happen unless that condition is met.
Means 'not until' or 'only after'. Used to say that something becomes possible or happens only after a condition is fulfilled. Often translates to 'unless' in negative contexts.
病気になって初めて、健康のありがたさが分かる。
Unless you get sick, you don't appreciate your health.
〜ない限り is the most direct equivalent of 'unless' and works in both formal and informal settings. 〜なければ is a general conditional 'if not' and is slightly more casual. 〜ないと is very casual and often implies a warning or negative outcome. Choose based on formality and nuance.
急がない限り、間に合わない。
Unless you hurry, you won't make it. (neutral/formal)
急がなければ、間に合わない。
If you don't hurry, you won't make it. (casual/neutral)
勉強しない限り、試験に合格できないよ。
Unless you study, you won't pass the exam.
君が一緒に来ない限り、行かない。
I won't go unless you come with me.
Unless it rains, we'll go on a picnic.
A common conditional meaning 'if not'. Often used in everyday speech. Can replace 'unless' in many contexts, though it's literally 'if you don't...'.
More literally 'if not', so it can sound slightly less formal than 〜ない限り. In casual speech, 〜なきゃ is often used.
急がなければ、遅れるよ。
Unless you hurry, you'll be late.
Casual conditional meaning 'if not' or 'unless'. Often implies a negative consequence if the condition isn't met. Common in spoken Japanese.
早く行かないと、売り切れちゃうよ。
Unless we go quickly, it'll sell out.
A formal pattern meaning 'unless' or 'without doing'. Often used when the condition is essential for a result. Common in written Japanese.
実際に見ないことには、判断できない。
Unless I see it in person, I can't judge.
A very formal/literary pattern meaning 'without' or 'unless'. Often used in speeches or essays.
努力なくしては、成功はあり得ない。
Unless you make an effort, success is impossible.
You gotta hurry or you won't make it. (casual)
Japanese does not have a single word that directly corresponds to 'unless'. Instead, use conditional patterns like 〜ない限り or 〜なければ. Translating word-for-word will result in unnatural Japanese.
You gotta hurry or you won't make it. (casual)
Japanese does not have a single word that directly corresponds to 'unless'. Instead, use conditional patterns like 〜ない限り or 〜なければ. Translating word-for-word will result in unnatural Japanese.