蚊帳かやの外そと

expression, noun

being left out; being excluded; being kept in the dark

Idiomatic expression describing a situation where someone is deliberately or inadvertently excluded from a group, information, or decision-making. Often used with verbs like 置かれる or される. The literal image is of being outside a mosquito net while others are inside.

• 大だい事じな会かい議ぎなのに、私わたしは蚊帳かやの外そとに置おかれた。

  Even though it was an important meeting, I was left out of the loop.

• 彼かれだけが蚊帳かやの外そとで、何なにも知しらされていなかった。

  He alone was kept in the dark and wasn't told anything.