noun
decisive moment; critical moment; crucial moment
Refers to the exact instant when an outcome is determined or a situation changes irreversibly. Often used in photography, sports, and dramatic narratives.
彼は決定的瞬間をカメラに収めた。
He captured the decisive moment on camera.
試合の決定的瞬間は、逆転のホームランだった。
The crucial moment of the game was the come-from-behind home run.