即日(そくじつ)

即日(そくじつ) emphasizes that something happens on the very same day as another event, with no waiting period. Often used as a noun modifier before another noun.

Common collocations

• 即日(そくじつ)配達(はいたつ): same-day delivery
• 即日(そくじつ)発送(はっそう): same-day shipping
• 即日(そくじつ)回答(かいとう): same-day response
• 即日(そくじつ)開票(かいひょう): same-day vote counting
• 即日(そくじつ)完売(かんばい): sold out on the same day

Similar words

• 当日(とうじつ): on that day, the day in question (neutral — does not emphasize speed)
• 本日(ほんじつ): today (formal, used in announcements)
• 即日(そくじつ) specifically highlights the speed or immediacy, implying no delay

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Formal. Common in business, advertising, and official announcements. In casual speech, その日(ひ)のうちに (within that day) is more natural.