noun
unprompted remark; unsolicited statement
Refers to speaking about something without being asked, often implying the speaker is volunteering information or opinions. Can carry a slightly negative nuance of talking out of turn.
彼は誰も聞いていないのに、問わず語りに自分の失敗談を話し始めた。
He started telling his failure story unprompted, even though no one asked.
会議中、彼女の問わず語りが長くて、議題が進まなかった。
During the meeting, her unsolicited remarks went on so long that the agenda didn't progress.