expression, godan verb (-u)
speak one's mind; be frank; tell the truth
Used when someone reveals their true feelings or honest opinion, often after hiding it. Contrasts with 建前 (tatemae), the public stance.
彼はいつも本音を言うから、信頼できる。
He always speaks his mind, so I can trust him.
会議で
It's hard to be frank in meetings.