ではあるまいか means isn’t it; I wonder if it’s not ~. It is a JLPT N1 Japanese grammar pattern used to present a conjecture or tentative opinion as a rhetorical question — often implying the speaker believes the statement is true.
This grammar point often appears in formal essays, editorials, critical commentary, and JLPT N1 reading passages. If you want to float a suggestion or express a suspicion with scholarly distance, ではあるまいか is a useful pattern to learn because it adds precision and a layer of formality to your Japanese.
What does ではあるまいか mean?
Use ではあるまいか when you want to put forward a belief or suspicion while maintaining a formal, questioning stance. The speaker typically thinks the proposition is likely, but presents it as an open question for rhetorical or polite effect.
Natural translations include:
- isn’t it the case that ~?
- might it not be that ~?
- I wonder if it’s not actually ~
Try to notice the writer’s or speaker’s attitude first, then choose the English phrase that fits that context.
How to form ではあるまいか
The pattern is built from である (formal copula), the negative volitional/conjectural auxiliary まい, and the question marker か. When the preceding clause is a verb or i-adjective, you need の to nominalise it.
Examples of the pattern:
- 問題ではあるまいか
- 不可能ではあるまいか
- 影響を与えているのではあるまいか
- 早すぎるのではあるまいか
In JLPT questions, the wrong answer choices often use a similar meaning but attach it to the wrong type of word, or omit the の where it is required.
When is ではあるまいか used?
Use ではあるまいか in situations like:
- raising a doubt or critical point in a formal argument
- making a suggestion that you believe is correct but want to soften
- commenting on someone else’s claim with scholarly detachment
- expressing a personal conjecture in an essay or editorial
Tone and register:
- formal, often literary; common in newspaper editorials, academic writing, and formal speeches
- It is rare in casual conversation. In daily speech people use ではないか or じゃないか.
- Common in test questions, essays, and JLPT N1 reading
ではあるまいか example sentences
After reading each sentence, ask what job ではあるまいか is doing: presenting a suspicion or suggestion as a formal rhetorical question.
Nuance of ではあるまいか
The key nuance is the speaker holds a belief but presents it as a question to maintain a formal, non-confrontational tone.
A pattern may look like a straightforward negative-questions structure, but it carries a specific rhetorical weight.
For example:
- In context, ではあるまいか often implies that the writer has already considered the evidence and is inviting the reader to reach the same conclusion, rather than genuinely asking.
- Compared with ではないか, it feels more detached, more intellectual, and less conversational. A TV commentator might use ではないか; a policy white paper would use ではあるまいか.
ではあるまいか vs ではないか
Both ではあるまいか and ではないか can express “isn’t it?”, but they are different.
Common mistakes with ではあるまいか
Watch out for these mistakes:
A helpful practice method is to write one sentence with ではあるまいか, then rewrite it with ではないか.
Is ではあるまいか on the JLPT?
Yes. ではあるまいか is commonly taught as JLPT N1 grammar.
That means learners should be able to:
- recognize it in reading
- understand its nuance in context
- use it in simple original sentences
Practice questions for ではあるまいか
Learning path for ではあるまいか
To learn ではあるまいか efficiently, start with its formation, then compare it with similar patterns, and finally practice in context.
Related grammar to review next
- ではあるまいし — because it uses the same ではあるまい base but with a different concessive function (“it’s not as if…”)
- ではすまない — because it also starts with では and expresses a negative evaluation, but about insufficiency rather than conjecture
- でなくてなんだろう — because it is another formal rhetorical question pattern (“what else could it be but ~?”)
- でもなんでもない / くもなんともない — because both patterns emphatically negate something, which contrasts with the conjectural affirmation of ではあるまいか
Learn ではあるまいか with Hane
If you want to review ではあるまいか together with the related patterns above, Hane helps you practice Japanese in short, focused sessions.
Browse more lessons here:
FAQ about ではあるまいか
What does ではあるまいか (dewa arumai ka) mean in Japanese?
ではあるまいか (dewa arumai ka) means “isn't it; I wonder if it’s not”. It is JLPT N1 grammar. Use ではあるまいか when you want to put forward a belief or suspicion while maintaining a formal, questioning stance. The speaker typically thinks the proposition is likely, but presents it as an open question for rhetorical or polite effect.
How do you form ではあるまいか (dewa arumai ka)?
The pattern is built from である (formal copula), the negative volitional/conjectural auxiliary まい, and the question marker か. When the preceding clause is a verb or i-adjective, you need の to nominalise it.
What is an example sentence with ではあるまいか (dewa arumai ka)?
問題の解決策は、政府の協力なしには不可能ではあるまいか。 — Isn’t the solution to this problem impossible without government cooperation?