Translation guide
Expresses that an action or state continues throughout the entire day. Japanese uses various adverbial phrases and time expressions, often with emphasis on duration or completeness.
To say that something happens or continues for the whole day, from morning to night.
The most common and neutral way to say 'all day long'. It can be used for both ongoing actions and repeated events.
It rained all day long yesterday.
He plays games all day long.
A variant of 一日中, often used in casual writing or speech. The meaning is identical.
I was busy all day long today.
A formal, written term often used in business or official contexts. It means 'all day' or 'throughout the day'.
The meeting was held all day long.
To stress that an action continues without stopping for the entire day.
Adds ずっと to emphasize the uninterrupted nature of the action. Very common in speech.
She was studying all day long.
Literally 'from morning to night', this phrase emphasizes the entire waking day. It can imply a long, tiring duration.
I worked all day long.
To describe something that someone does typically or as a habit throughout the day.
Using the ている form with 一日中 indicates a habitual or ongoing state. It can describe what someone is usually doing all day.
He sleeps all day long.
一日 (いちにち) simply means 'one day' or 'a day'. To express 'all day long', you must add 中 (じゅう) to indicate 'throughout'. Saying 一日だけ (just one day) is different from 一日中 (all day).
Adding ずっと after 一日中 makes it clear that the action was continuous without breaks. It's very natural in conversation.
I could sleep all day long.
The kids played outside all day long.
A literary expression meaning 'day in and day out' or 'all day long'. It conveys a sense of monotony or constant repetition.
I think about it all day long.