GRAMMAR
〜じゃないか
isn't it?
Explanation
NOTE
じゃないか is a rhetorical tag meaning isn't it? or don't you think?. The speaker is not genuinely asking — they are seeking agreement or expressing a strong impression.
NOTE
Attach じゃないか to the plain form of a verb. It can also express surprise when you notice something unexpected — like exclaiming "Hey, isn't that...!". The tone is casual and assertive.
STRUCTURE
V普
じゃないかやっぱり正しかったじゃないか。
Yappari tadashikatta janai ka.
See, I was right, wasn't I?
これ、美味しいじゃないか。
Kore, oishii janai ka.
Hey, this is delicious, isn't it!
もう終わったじゃないか。
Mou owatta janai ka.
It's already over, isn't it?
Practice exercises
1
すごいじゃないか。
That's amazing, isn't it?
Answer
じゃないか
2
雨が降っているじゃないか。
It's raining, isn't it!
Answer
じゃないか
3
面白いじゃないか。
It's interesting, isn't it!
Answer
じゃないか
4
明日は雨が降るじゃないか。
It's going to rain tomorrow, isn't it?
Answer
じゃないか
5
この映画はとても面白いじゃないか。
This movie is very interesting, isn't it?
Answer
じゃないか
6
昨日、彼が犯人だった中ではないか。
Yesterday, he was the culprit, isn't he?
Answer
中ではないか
7
もう終わったじゃないか。
It's already over, isn't it?
Answer
じゃないか
8
やっぱり正しかったじゃないか。
See, I was right, wasn't I?
Answer
じゃないか