江戸の敵を長崎で討つ
Idiom- 1to hit someone where they least expect it ; to take revenge on someone in an unlikely place ; to get revenge on someone in a different contest ; to attack the Edo enemy in Nagasaki Translated by Jiyomi
Other writings and readings
江戸の仇を長崎で討つ江戸のかたきを長崎で討つ
expressions (phrases, clauses, etc.) · Godan verb with 'tsu' ending
JMdict entry 2102380. Source and licence.