ジャストアイデア

noun

just an idea; just a thought

Wasei-eigo used to preface a casual suggestion or brainstorm, similar to 'just throwing this out there'.

wasei-eigo (Japanese-coined English), from just idea

• ジャストアイデアだけど、来らい週しゅうの会かい議ぎはオンラインにしない？

  Just an idea, but how about making next week's meeting online?

• ジャストアイデアなんですけど、このデザインに星ほしを足たしたらどうでしょう。

  It's just a thought, but how about adding a star to this design?