Grammar Info

N1 Lesson 2: 1/17


You are not ~ so..., it isn't ~ so...


Noun + じゃある(1) + まい
Verb + + じゃある(1) + まい
Verb + わけ + じゃある(1) + まい

(1) ではあるでもある


  • Register


  • 使用域


About じゃあるまいし

じゃ or ではあるまいし is an expression which can be translated in a similar way to 'it is not (A), so it is not (B)', or 'you are not (A), so you can't (B)', and is often used for criticism of something acting in a way that is not befitting of it.
まい is an auxiliary verb which highlights negative-volitional statements. This means that it has a similar meaning to ないだろう. Due to this, the combination of では, the う-Verb ある 'to be', まい 'not as if', and し, the particle that highlights reasons, all combine to have a literal meaning of 'it is not as if it's (A), so therefore (B)'.
じゃあるまいし will be used after nouns, or phrases that have been nominalized with something like の.
  • (おや)()められているのではあるまいし()きに自分(じぶん)()きたいところに()けばいいんじゃないの?
    You are not being stopped by your parents, so why don't you just go wherever you want to?
  • ()るわけではあるまいし(すこ)しぐらい()してくれてもいいじゃん。
    It's not like it's going to decrease, so why don't you just let me borrow it?
  • もう子供(こども)じゃあるまいし行動(こうどう)する(まえ)(すこ)しでも(かんが)えたらどうなの?
    You aren't a child anymore, so why don't you think a little before taking action.
The statement that follows じゃあるまいし will state the speaker's opinion in relation to (A), and will almost always be negative.


  • 子供(こども)じゃあるまいし菓子(かし)()つけた途端(とたん)全部(ぜんぶ)()べるな!

    You are not a child, so don't instantly eat every sweet you stumble upon!

  • A: 「野菜(やさい)()じゃない!」
    B: 「(あか)ちゃんでもあるまいしもう駄々(だだ)をこねるのはよして!」

    A: 'I don't like veggies!'
    B: 'You are not a baby, so stop whining already!'

  • A:「いってきます!」
    B: 「まって、砂漠(さばく)じゃあるまいし(そと)()たら厚着(あつぎ)をしろよ!」

    A: 'I am heading out!'
    B: 'Wait, it's not a desert (outside), so if you go out then dress warmly!'

  • アニメじゃあるまいしかわいい(おんな)()(きゅう)(そら)から()ちてこない。

    This is not an anime, so a cute girl won't suddenly fall out of the sky!

  • 田中(たなか)さん新入(しんにゅう)社員(しゃいん)でもあるまいし!そんな簡単(かんたん)なミスはすべきじゃない

    Tanaka-san! You are not a new employee, so you should not make such simple mistakes.

  • Get more example sentences!

    Premium users get access to 12 example sentences on all Grammar Points.

Self-Study Sentences

Study your own way!

Add sentences and study them alongside Bunpro sentences.

じゃあるまいし – Grammar Discussion

    There's currently no discussion for じゃあるまいし
    Ask questions and learn together with other Bunpro users!