ではない lives in textbooks. じゃない does the real work, and じゃねえ is the rough version that comedians use to push back.
じゃない is fine with anyone casual. じゃねえ is blunt: friends only.
The performer is sulkily complaining about being ditched whenever 'that other one' becomes more comfortable to sleep on.
some heating appliance, isn't it?
Textbookそれでは、私はまるで暖房器具のようではありませんか。'のようではありませんか' → 'みたいじゃない': 'では' contracts to 'じゃ', plain 'ない' works as 'isn't it?', and 'のよう' becomes casual 'みたい'.
One friend is getting married, and the other complains there is no place for them at the wedding.
Culture note At Japanese weddings, guest tables are often labeled by group, such as 'groom's friends' (新郎友人).
I told you I'm not going!
Textbook行かないと言っているではありませんか。「ではないか」 → 「じゃない」 → 「じゃん」: a rhetorical 'I'm telling you!', not a real negative.
One of them insists that seeing 'You already own this' over and over doesn't bother them at all.
Your body's honest, isn't it!
Textbook体は正直ではありませんか。「ではありませんか」 drops to plain 「ではないか」, becomes 「じゃないか」, then clipped to 「じゃん」. Not a negative here: it means 'see, isn't it?', pointing out the obvious.
One performer unveils something with a big flourish, and the other is amazed at how impressive it is.
Culture note The Big Light is Doraemon's gadget that makes things bigger. 腐女子 ("rotten girl") is slang for a woman who loves stories about romance between men.
Hold on, those are both guys!
Textbook男同士ではありませんか。「ではないか」 shortens to 「じゃないか」 (「では」→「じゃ」). Here it is a surprised exclamation, 'Why, it's two guys!', not a real negative.
One man suggests they work together to find the answer, and the other happily agrees.
and have a showdown over whose is really closer — bring it on!
Textbookどちらが本当に近いか、対決しようではありませんか。Formal 「やろうではないか」 ('shall we not do it?') shortens 「では」 to 「じゃ」 → 「やろうじゃないか」: a bold challenge, not a real negative.
From other routines in the library. Automatic transcripts, not yet checked line by line.
〜じゃない means “isn’t it?” / rough “isn’t”. ではない lives in textbooks. じゃない does the real work, and じゃねえ is the rough version that comedians use to push back.
With friends: OK. With coworkers: careful. With a boss or teacher: avoid. じゃない is fine with anyone casual. じゃねえ is blunt: friends only.
In 1,905 live comedy routines, 〜じゃない appears in 6,533 lines from 259 comedians, and the textbook 〜ではない in 168 lines.