ここ一いち番ばん

expression, noun

the crucial moment; the moment of truth; do-or-die situation

Refers to a decisive moment or critical juncture where one must give one's all. Often used in sports, business, or personal challenges.

• ここ一いち番ばんというときに彼かれは強つよい。

  He is strong when it really counts.

• ここ一いち番ばんの勝しょう負ぶで力ちからを発はっ揮きした。

  They showed their strength in the do-or-die match.