じゃないか

expression

isn't it?; right?

Casual tag question seeking agreement or confirmation, similar to 'isn't it?' or 'right?'. Often used with a falling intonation when the speaker expects agreement.

• これ、美味おいしいじゃないか。

  This is delicious, isn't it?

• あの人ひと、田た中なかさんじゃないか。

  That person is Tanaka-san, isn't it?

expression

let's ...; why don't we ...; how about we ...; shouldn't we ...

Follows the volitional form of a verb to make a casual suggestion or invitation. Equivalent to 'let's do' or 'why don't we do'. The speaker is proposing an action involving the listener.

• そろそろ行いこうじゃないか。

  Let's get going, shall we?

• 一いっ緒しょに食たべようじゃないか。

  Why don't we eat together?