人ひと事ごと

noun

other people's affairs; someone else's problem

Refers to matters that do not concern oneself. Often used in expressions like 人事ではない (it's not someone else's problem) or 人事のように (as if it were someone else's problem).

• 環かん境きょう問もん題だいはもう人ひと事ごとではない。

  Environmental issues are no longer someone else's problem.

• 彼かれは自じ分ぶんの失しっ敗ぱいを人ひと事ごとのよう