Explore Words Kanji Grammar Guides

Copyright © 2026 Kotomora. All Rights Reserved.

Get the Kotomora apps for iOS and Android.

Explore Words Kanji Grammar Guides About Support Privacy

Copyright © 2026 Kotomora. All Rights Reserved.

一日中 (いちにちじゅう) Japanese meaning | Kotomora

一いち日にち中じゅう

い

ち

に

ち

じゅ

う

Meanings

1

all day long; throughout the day

Describes an action or state that continues for the entire day. Often used with verbs like いる, 寝る, 働く, or 遊ぶ.

昨日きのうは一いち日中にちじゅう雨あめが降ふっていた

。

It rained all day yesterday.

彼かれは一いち日にち中じゅうゲームをして過すごした。

He spent the whole day playing games.

Usage patterns

一日中いちにちじゅう〈場所ばしょ〉にいるにいるto stay somewhere the whole day
今日きょうは一いち日中にちじゅう家いえにいた。
I stayed home all day today.
一日中雨いちにちじゅうあめが降ふるfor rain to fall all day long
昨日きのうは一いち日中にちじゅう雨あめが降ふっていた。
It rained all day yesterday.
一日中忙いちにちじゅういそがしいto be busy all day
今日きょうは一いち日にち中じゅう忙いそがしかった。
I was busy the whole day today.

Kanji

一one, one radical (no.1)
日day, sun, Japan
中in, inside, middle

Related words

終しゅう日じつN1
終日 is a more formal, literary way to say 'all day long', while 一日中 is the everyday spoken equivalent.
四し六ろく時じ中ちゅうN1
一日中 means 'all day long' and usually refers to the daytime hours, while 四六時中 covers the full 24-hour cycle including night.

Don't confuse with

一いち日にちN5
一日 simply means 'one day' or 'a day', whereas 一日中 specifically stresses that something continues for the entire day.

Built from

一いち日にち+中じゅう

Written forms

一いち日にち中じゅう
Standard kanji spelling; the most common written form.
１いち日にち中じゅう
Variant using numeral 1; often seen in informal writing.

Etymology

Compound of 一日 (いちにち, 'one day') and 中 (じゅう, 'throughout'). The reading じゅう is a rendaku form of ちゅう.