産うぶ声ごえ

noun

first cry of a newborn baby

Refers specifically to the very first cry a baby makes right after birth. Often used metaphorically for the beginning or debut of something new.

• 赤あかちゃんの産うぶ声ごえが聞きこえた瞬しゅん間かん、涙なみだが出でた。

  The moment I heard the baby's first cry, tears came to my eyes.

• このプロジェクトは、まさに会かい社しゃの新しん事じ業ぎょうの産うぶ声ごえと言いえる。

  This project can truly be called the first cry of the company's new business.