SuGoiSuす語彙すGrammar › N1 · 01 Conditions and hypotheticals
〜とあらば: if it comes to ...; if required
N1 · 01 Conditions and hypotheticals
A stiffer, old-fashioned form of 〜とあれば: if that is the situation, I will do it.
Noun or plain-form clause + とあらば. It sounds dramatic or samurai-like, and is used in formal speech, literature and heroic lines. In ordinary conversation, use 〜とあれば or 〜なら.
Examples
国のためとあらば、この命を差し出す覚悟です。
If it is for my country, I am ready to give up my life.
客の頼みとあらば、深夜でも店を開けます。
If the customer asks, we will open the shop even late at night.