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