夜更かし

• 読み: よふかし
• ローマ字: yofukashi
• 漢字の分解: 夜 (yo/yoru) — night; 更かし (fukashi) — staying late, deepening the night
• 発音: /jo.ɸɯ.ka.ɕi/

意味

Staying up late; keeping late hours; sitting up into the night beyond one's usual bedtime.

A noun (often used with する) describing the habit or act of staying up later than usual or than is considered healthy. Unlike 徹夜 (pulling an all-nighter, typically for work or study), 夜更かし carries a slightly indulgent, leisure-driven nuance — watching films, reading, or simply losing track of time. It appears commonly in casual conversation and health-related discussions.

例文

1. 休日前は夜更かしして好きな映画を何本も見てしまう。
2. 夜更かしが続いたせいで、最近ずっと体がだるい。
3. 子供の頃、親に内緒で夜更かしして漫画を読むのが楽しみだった。

使い方ガイド

場面: daily life, health, habits, leisure

トーン: slightly indulgent

起源と歴史

Compound of 夜 (yo/yoru, night) and 更かし (fukashi, deepening/staying late into). 更 (kou/fuke) means to deepen or advance through the night — as in 夜が更ける (the night grows late).

文化的背景

時代: Modern

世代: All ages

社会的背景: Universal