noun
24 hours; twenty-four hours
A period of exactly one full day; used in contexts like business hours, marathon events, or continuous operation.
この店は２４時間営業です。
This shop is open 24 hours.
２４時間以内に返事をください。
Please reply within 24 hours.
Commonly written with Arabic numerals; the most frequent spelling in modern Japanese.
Kanji spelling; less common but still used, especially in formal or vertical writing.
Compound of 二十四 (twenty-four) and 時間 (hours). A straightforward numerical expression.