闇やみ夜よに鉄てっ砲ぽう

noun

aimless attempt; shot in the dark

Proverbial expression for an action taken without clear aim or information, like firing a gun in the dark. Often used when someone does something without knowing what they are aiming at or without a clear plan. Rare in modern conversation; more common in literary or explanatory contexts.

• そんなやり方かたは闇やみ夜よに鉄てっ砲ぽうだ。

  That approach is just a shot in the dark.

• 情じょう報ほうもなしに投とう資しするのは闇やみ夜よに鉄てっ砲ぽうのようなものだ。

  Investing without any information is like firing a gun in the dark.