ここだけの話はなし

expression, noun

just between you and me; confidentially

Used as a set phrase to introduce a secret or private remark, often at the beginning of a sentence. Functions as a noun or adverbial expression.

• ここだけの話はなし、彼かれは来らい月げつ会かい社しゃを辞やめるらしいよ。

  Just between you and me, I hear he's quitting the company next month.

• ここだけの話はなしだけど、実じつは宝たからくじに当あたったんだ。

  This is just between us, but I actually won the lottery.