also: ジャストアイディア
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、来週の会議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、このデザインに星を足したらどうでしょう。
It's just a thought, but how about adding a star to this design?