noun
counterintelligence agency
A government or military organization responsible for counterintelligence activities against enemy espionage.
対敵諜報機関は敵のスパイ活動を阻止する任務を負っている。
The counterintelligence agency is tasked with thwarting enemy espionage activities.
Compound of 対敵 (anti-enemy) + 諜報 (intelligence) + 機関 (agency).