狙い所

ねらいどころ
target
objective

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ねらいどころ【狙い所】

one's [the] point [aim, intent]; one's objective; what one is aiming at.

●ねらいどころがよい aim right; look in the right direction

・彼の研究はねらいどころがよかった. His research was aimed in the right direction. | His inquiry was based on a good insight [made a good point].

●〔味方の油断を戒めて〕 それがやつらのねらいどころだ, 気をつけろ. That's just what they're looking for. Keep your eyes wide open.