本日中(ほんじつちゅう)

ほんじつちゅう
noun
by today; within the day; before the day is over
1. by today; within the day; before the day is over
A formal way of saying something must happen or be completed before the current day ends.
本日中(ほんじつちゅう)にお届(とど)けします。
We will deliver it within today.
本日中(ほんじつちゅう)に返事(へんじ)をお願(ねが)いします。
Please reply by the end of today.
書類(しょるい)は本日中(ほんじつちゅう)に提出(ていしゅつ)していただけますか。
Could you submit the documents by today?

A formal expression meaning "within today" or "by the end of today." A compound of 本日(ほんじつ) (today — formal) and 中(ちゅう) (within; during). Used in business, customer service, and official communication.

COMMON COLLOCATIONS:

  • 本日中(ほんじつちゅう)に届(とど)く: to arrive within today
  • 本日中(ほんじつちゅう)に完了(かんりょう)する: to complete by today
  • 本日中(ほんじつちゅう)に回答(かいとう)する: to reply by today
  • 本日中(ほんじつちゅう)の発送(はっそう): shipment within today

REGISTER:
Formal. In casual speech, 今日中(きょうじゅう) (by today) is the everyday equivalent. 本日中(ほんじつちゅう) is preferred in business emails, announcements, and customer-facing communication.

SIMILAR EXPRESSIONS:

  • 今日中(きょうじゅう): by today — casual equivalent
  • 本日(ほんじつ): today — formal for 今日(きょう)
  • 午前中(ごぜんちゅう): within the morning; by noon
general
Added 2026.4.8 2:12
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