How to say "coincidence" in Japanese

Choosing the right word
  • 偶然ぐうぜんJLPT N3approx.Common
    na-adjective, no-adjectiveCovers coincidence as pure chance: an unexpected, unplanned overlap of events. This is the word you want for 'What a coincidence!' — running into someone, or two things happening at once by chance.
  • 符合ふごうCommon
    noun, suru verb, intransitive verbCovers coincidence as correspondence: two facts, accounts, or events that match. The nuance is of separate things turning out to agree with one another; the word points to the match itself.
    その記事きじは事実じじつと符合ふごうしない。↗
    This account does not agree with the facts.
  • 併発へいはつCommon
    suru verb, transitive verb, intransitive verb, no-adjectiveRarely the word you want for coincidence as chance: it means two things, especially illnesses, occurring at the same time, one complicating the other.
  • 一致いっちJLPT N3approx.Common
    noun, suru verb, intransitive verbCovers coincidence as agreement or accord: opinions, accounts, or figures that match and are consistent. For a chance coincidence of events it is not the word you want — it is really 'agreement'.
    凶器きょうきに残のこされた指紋しもんは容疑者ようぎしゃのものと一致いっちする。↗
    The fingerprints left on the weapon correspond with the suspect's.

Use 偶然 for coincidence as chance; 符合 or 一致 when coincidence means correspondence between matching facts or opinions; 併発 only for two things, especially illnesses, occurring at the same time.

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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