expression, noun
bargaining chip; negotiating card
Refers to something held in reserve to gain an advantage in negotiations, similar to a trump card.
彼は賃上げ交渉で、他社からの内定を交渉カードに使った。
He used a job offer from another company as a bargaining chip in salary negotiations.
その情報は、契約更新の交渉カードになる。
That information will be a negotiating card for the contract renewal.