江え戸どの敵かたきを長なが崎さきで討うつ

expression, godan verb (-tsu)

to take revenge in an unexpected place or context; to hit someone where they least expect it

Proverbial expression meaning to retaliate or get even in a completely different setting from where the original offense occurred. Often used figuratively for settling scores in unrelated situations. The literal image is attacking an Edo enemy far away in Nagasaki.

• 彼かれは昔むかしのライバルを別べつの業ぎょう界かいで打うち負まかし、まさに江え戸どの敵かたきを長なが崎さきで討うつようなことをした。

  He defeated his old rival in a completely different industry, truly taking revenge in an unexpected place.

• あの会かい社しゃは、かつての取とり引ひき先さきに裏うら切ぎられたが、今こん度どは海かい外がい市し場じょうで成せい功こうして江え戸どの敵かたきを長なが崎さきで討うった。

  That company was betrayed by a former business partner, but now they've succeeded in the overseas market, getting their revenge in a different arena.