How to say "coincide" in Japanese

• かち合うかちあう
  godan verb, intransitive verbIts core meaning is to clash or conflict, so use it when things coinciding get in each other's way, as when two appointments fall at the same time; a less common choice for plain 'coincide'.
  試験しけんの日ひが私の姉あねの結婚式けっこんしきとかち合あった。↗

  The date of the examination clashed with my sister's wedding.
• ＷるダブるJLPT N1approx.
  godan verb, intransitive verbCovers 'coincide' in the sense of overlapping or falling together, especially of dates, as when two engagements land on the same day; a less common choice, with a nuance of duplication.
  祭日さいじつが日曜にちようにダブると月曜げつようが休やすみになる。↗

  When a holiday falls on Sunday, we have an extra holiday on Monday.

Use 「かち合う」 when things happening at the same time clash or conflict, and 「Ｗる」 when dates or content overlap or fall together; both are less common choices for plain 'coincide'.

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

• かち合うかちあうto clash
• ダブるto overlap