expression, adverb
A fixed adverbial phrase used to express regret or disappointment about a situation. Often appears at the beginning of a sentence or clause.
残念ながら、明日のイベントは中止になりました。
Unfortunately, tomorrow's event has been canceled.
残念ながら、彼はその試験に合格できなかった。
Regrettably, he was unable to pass the exam.