昼間|ひるまhiruma[3]odaka (tail-high)

1. noun, adverbdaytime; during the day; time from sunrise until sunset; diurnal period
   太陽たいようは昼間ひるま輝かがやく。↗

   The sun shines during the day.

• Synonym日中にっちゅうWrittenWritten/formal prose for the daytime or around midday, as in 「日中の気温」; more formal than 「昼間」 and common in news and weather forecasts.
• Synonym白昼はくちゅうWrittenWritten word for broad daylight, as in 「白昼堂々」; often carries the nuance of something done openly in broad daylight.
• Related昼ひるNeutralNeutral word for noon, and also daytime or lunch, as in 「お昼にする」; 「昼間」 refers specifically to the daytime hours.
• Related昼日中ひるひなかCasualColloquial for broad daylight, stressing that it is precisely during the day, as in 「昼日中から酒を飲む」.
• Related昼中ひるなかCasualColloquial word for the daytime, used less often and close in feel to 「昼日中」.
• Related日間にっかんWrittenWritten word for the daytime or the span of a day; rarely used in modern Japanese.
• Antonym夜間やかんWrittenWritten antonym of 「昼間」 meaning nighttime, as in 「夜間診療」.
• Antonym夜よるNeutralNeutral antonym of 「昼間」 meaning night, as in 「夜になる」.

Use 「昼間」 as the default word for daytime. For formal or written contexts pick 「日中」, for broad daylight 「白昼」, for noon or lunch 「昼」, and for nighttime the antonyms 「夜間」 and 「夜」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 太陽たいようが出でていて明あかるい時間じかん。ひるま。