一昼夜

Japanese JLPT N1 Vocabulary Japanese ★★ 2/5 neutral いっちゅうやicchūya
読み いっちゅうや
ローマ字 icchūya
漢字の分解 一 (ichi) — one; 昼 (chū/hiru) — daytime; 夜 (ya/yoru) — night
発音 /it.tɕɯ.ja/

意味

A full day and night; a complete 24-hour period. Emphasises the unbroken continuity of both daytime and nighttime together.

A formal noun used to stress the full, uninterrupted passage of a 24-hour cycle. Often appears in contexts of sustained effort, endurance, or continuous duration — such as working, travelling, or being in critical condition for a solid day and night without rest.

例文

  1. 一昼夜をかけて険しい山を越えた。
  2. 患者は一昼夜、意識が戻らなかった。
  3. 議論は一昼夜にわたって続いた。

使い方ガイド

場面: formal writing, duration, endurance, narrative

トーン: neutral

起源と歴史

Compound of 一 (one), 昼 (daytime), and 夜 (nighttime). The term directly captures one complete cycle of day and night, emphasising wholeness rather than simply counting hours.

文化的背景

時代: Classical

世代: Adults

社会的背景: Universal

関連フレーズ

年度 Fiscal year; academic year; official year. A defined annual period used for administrative, educational, or financial purposes, often not aligned with the calendar year. 昭和 The Shōwa era; the imperial reign period of Emperor Hirohito, spanning 1926 to 1989. One of the longest and most historically eventful eras in Japanese history. 歴史的 Historic; historical. Describes something of great historical significance, or something related to history in general. 元号 Era name; the official name given to a reign period in the Japanese imperial system. Japan currently uses the era Reiwa, which began in 2019. 干支 The Chinese zodiac; the traditional sexagenary cycle combining the ten Heavenly Stems and twelve Earthly Branches. Also used colloquially to refer to one's zodiac animal sign. 年号 Era name; Japanese era designation. An official name given to a reign period in the traditional Japanese calendar system. 年度末 End of the fiscal year or academic year; year-end in the Japanese administrative calendar. Typically refers to late March. 戦前 Pre-war; the period before a war. In Japanese, typically refers to Japan before World War II, particularly before 1937 or 1941.
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