Translation guide
A guide to expressing the English phrase 'or else' in Japanese, covering its main uses: presenting an alternative, giving a warning or threat, and expressing 'otherwise'.
or else (alternative)
Use か for listing options, それとも for questions.
To present another option or possibility, equivalent to 'or' or 'or alternatively'.
The most basic way to list alternatives. Simply use the particle か between nouns or clauses.
Would you like coffee or tea?
Which would you prefer, watching a movie or relaxing at home?
Used when asking someone to choose between two options, often in questions. More conversational than か alone.
Are you going by train, or by bus?
Formal or written alternative to か. Often used in official documents or instructions.
To imply negative consequences if something is not done, often used as a standalone phrase or at the end of a sentence.
Literally 'if not so', this is the most direct equivalent of 'or else' as a threat. It can be used at the beginning or end of a sentence.
Hurry up, or else I'm leaving you behind.
A slightly softer, more conversational version of さもないと. Literally 'if you don't do that'.
Casual contraction of そうでないと. Common in everyday speech.
A shortened form often used in casual speech, where the verb negative conditional implies 'or else'. The consequence is often left implied.
Hurry up, or else!
To state what will happen if the preceding condition is not met, similar to 'if not, then...'.
Do not translate 'or else' word-for-word as または他 (mata wa hoka) or similar. This is unnatural and does not convey the intended meaning.
さもないと is more common in spoken threats or warnings, while さもなければ is preferred in formal writing. Both mean 'otherwise', but the nuance of urgency is stronger with さもないと.
Please present your passport or driver's license.
Do your homework, or else no games.
You'd better apologize properly, or else she'll get even angrier.
急ごう、でないと遅れる。
Let's hurry, or else we'll be late.
Please submit this document by Friday. Otherwise, your application will be rejected.
It might rain. Otherwise, let's go on a picnic.
He's busy. Otherwise, he would come.