Last Updated
：2025/12/07
白河夜船
Hiragana
しらかわよふね
Phrase
idiomatic
Japanese Meaning
ぐっすり眠っていて、周囲の状況にまったく気づかないこと。また、知ったかぶりをして、実際にはよく分かっていないのに分かったふりをすることをたとえる表現。
Easy Japanese Meaning
よく知らないことを、知っているふりをして話すようすをあらわすことば
Sense（1）
being fast asleep, dead to the world when sleeping
Sense（2）
pretending to know everything, a know-it-all manner
（ canonical ）
（ romanization ）
（ romanization ）
（ hiragana historical ）
（ hiragana ）
Quizzes for review
being fast asleep, dead to the world when sleeping / pretending to know everything, a know-it-all manner
See correct answer
白河夜船
See correct answer
He was sleeping deeply like being fast asleep.
See correct answer
彼は白河夜船のように深く眠っていました。
Japanese - English
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