リーズン

noun

reason; grounds; cause

A direct loan from English, used in modern Japanese to mean a reason or basis for something. Often found in business, technical, or casual contexts.

• その決けっ定ていのリーズンを教おしえてください。

  Please tell me the reason for that decision.

• 彼かれが遅ち刻こくしたリーズンは電でん車しゃの遅ち延えんだ。

  The reason he was late is a train delay.