この事で

about this matter

→ 此の
phrase Rare #37,267
about this matter Depending on context, it can also mean “over this” or “for this.”
JA: この事で彼に感謝しています。
EN: I’m grateful to him for this.

トム、この事でなんか言ってた?

Did Tom say anything about this?

この事ではあなたに同意できません。

I can't agree with you on this matter.

この事で彼をいくらほめてもまだ足りない。

I can't praise him enough for this.

我々はこの事で彼をからかった。

We teased him about it.

この事で何も腹を立てるには及ばない。

There’s no need to get angry about this.