How to say "unlucky" in Japanese

Choosing the right word
  • 不吉ふきつJLPT N1approx.Common
    na-adjective, nounCovers 'unlucky' in the sense of ominous or inauspicious: things, signs, or happenings that seem to bode misfortune. It carries a foreboding, sinister nuance rather than describing a person's run of bad luck.
    13日にちの金曜日きんようびは不吉ふきつな日ひだと言いわれている。↗
    It is said that Friday the 13th is an unlucky day.
  • 細いほそいJLPT N5approx.Common
    i-adjectiveA slang rendering of 'unlucky'; the word's basic meaning is 'thin, slender.' As a way to say 'unlucky' it is casual and marginal, and learners will seldom want it in ordinary contexts.

Use 不吉 for the ominous, inauspicious sense of 'unlucky'—signs or things that seem to bode misfortune—while 「細い」 is only a slang way to say 'unlucky' and is rarely the word learners need.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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