夜よ更ふかし

よ

ふ

か

し

Common wordJLPTN2Freq.FrequencyTop 50,000

夜更かしする · noun or participle which takes 'suru'

Form	Positive	Negative
Dictionary	夜よ更ふかしする	夜よ更ふかししない
Polite	夜よ更ふかしします	夜よ更ふかししません
Past polite	夜よ更ふかししました	夜よ更ふかししませんでした
Past	夜よ更ふかしした	夜よ更ふかししなかった
Te-form	夜よ更ふかしして	夜よ更ふかししないで
Desire	夜よ更ふかししたい	夜よ更ふかししたくない
Potential	夜よ更ふかしできる	夜よ更ふかしできない
Passive	夜よ更ふかしされる	夜よ更ふかしされない
Causative	夜よ更ふかしさせる	夜よ更ふかしさせない
Causative passive	夜よ更ふかしさせられる	夜よ更ふかしさせられない
Volitional	夜よ更ふかししよう
Polite volitional	夜よ更ふかししましょう
Imperative	夜よ更ふかししろ	夜よ更ふかしするな
Conditional	夜よ更ふかしすれば	夜よ更ふかししなければ
Tara conditional	夜よ更ふかししたら	夜よ更ふかししなかったら

Meanings

noun, noun or participle which takes 'suru', intransitive verb

staying up late; keeping late hours

Commonly used as a noun or with する to describe intentionally staying awake late into the night, often for leisure or work.

昨さく夜やは夜よ更ふかしして、朝あさ起おきるのがつらかった。
I stayed up late last night and had a hard time waking up in the morning.
試し験けん前まえはいつも夜よ更ふかしをしてしまう。
I always end up staying up late before exams.

See all 37 example sentences ›

Usage patterns

夜よ更ふかしをするto stay up late
週しゅう末まつはよく夜よ更ふかしをする。
I often stay up late on weekends.
夜よ更ふかしが続つづくfor a pattern of staying up late to continue
最さい近きん、夜よ更ふかしが続つづいて体たい調ちょうが悪わるい。
I've been staying up late a lot lately and it's affecting my health.
夜よ更ふかしは体からだに悪わるいstaying up late is bad for your health
夜よ更ふかしは体からだに悪わるいとよく言いわれる。
People often say that staying up late is bad for your health.
〈人ひと〉に夜よ更ふかしをさせるto let/make someone stay up late
子こ供どもに夜よ更ふかしをさせないようにしている。
I try not to let my child stay up late.

Kanji

夜night, evening
更grow late, night watch, sit up late

Related words

徹てつ夜やN3
徹夜 means staying up the entire night without any sleep, while 夜更かし just means staying up later than usual, possibly still getting some sleep.

Opposites

早はや寝ねN1
早寝 means going to bed early, the direct opposite of 夜更かし, which means staying up late.
早はや寝ね早はや起おきN1
早寝早起き praises a healthy early-to-bed, early-to-rise routine, while 夜更かし describes staying up late, the lifestyle habit it warns against.

Don't confuse with

夜よ遊あそび
夜遊び means going out at night for fun (e.g. drinking, socializing), while 夜更かし just means staying awake late, regardless of activity or location.
朝あさ寝ね坊ぼうN1
夜更かし means staying up late at night, whereas 朝寝坊 refers to sleeping late in the morning; they're easily confused because both relate to disrupted sleep schedules.

Counted with

回かいN4
Used when counting instances of staying up late (e.g. 'three times').

Written forms

夜よ更ふかしUsage80%
Standard kanji spelling; high priority.
夜よふかしUsage20%
search-only kanji form
Search-only variant; not a common practical spelling.
夜更よふかしUsage1%
search-only kanji form
Search-only variant; not a common practical spelling.

Etymology

Compound of 夜 (yo, 'night') and 更かし (fukashi), the noun form of 更かす (fukasu, 'to stay up late'). The kanji 更 carries the meaning of 'growing late' or 'deepening' of night.