also: さぁ
Expresses one's own resolve or readiness before doing something.
interjection
Shows hesitation, uncertainty, or thinking while speaking.
さあ、どうだろう。
Well, I'm not sure.
さあ、何と言えばいいか。
Hmm, what should I say.
interjection
about that; actually
Used to interrupt or change the subject, often to bring up a related point.
さあ、その話だけど。
About that matter...
さあ、実はね。
Actually, you see...
Elongated variant, often used in casual writing or manga.
The origin is uncertain; it is a native Japanese interjection with no clear kanji or loanword source.