即そく夜や

adverb, noun

on the same night; that very night

Used to indicate that something happens on the same night as a previously mentioned event. Often appears in narrative or formal contexts.

• 彼かれは到とう着ちゃくした即そく夜や、会かい議ぎに出しゅっ席せきした。

  He attended the meeting on the same night he arrived.

• 事じ件けんの即そく夜や、警けい察さつが現げん場ばを調しらべた。

  The police investigated the scene that very night of the incident.