Modesty or humility: the attitude of downplaying one's abilities or achievements and acting humbly. Used as a noun, a suru-verb (謙遜する), or a na-adjective.
彼は成功しても決して謙遜しない人ではない。
Even after succeeding, he is not someone who fails to be humble.
謙遜することは日本では美徳とされることが多い。
Being modest is often considered a virtue in Japan.
面接では謙遜しすぎず、自分の長所を適切に伝えたほうがいい。
In interviews, it's better not to be overly modest and to appropriately convey your strengths.