How to say "convention" in Japanese

Choosing the right word
  • 大会たいかいJLPT N3approx.Common
    nounCovers 'convention' as a large gathering of people, such as a political party convention or a big annual conference; it points to a mass meeting or rally, not to a rule or agreement.
    彼かれか私のどちらかが大会たいかいに出席しゅっせきしなければならない。↗
    Either he or I have to attend the convention.
  • 伝統でんとうJLPT N3approx.Common
    nounHere 'convention' means a practice handed down over time — a tradition — not an event or a treaty. Use it for long-established customs, not for meetings or formal agreements.
    古ふるい伝統でんとうが消滅しょうめつしつつある。↗
    Old traditions are crumbling away.
  • 条約じょうやくJLPT N1approx.Common
    nounCovers 'convention' as a formal agreement between countries — the treaty sense, as in the Geneva Conventions. Use it in diplomatic or legal contexts, never for a gathering.
  • 慣習かんしゅうJLPT N1approx.Common
    nounCovers 'convention' as an accepted custom or common practice — the unwritten rules of how things are done in a society or field. It overlaps with 伝統 but stresses everyday customary behavior.
    我々われわれは地方ちほうの慣習かんしゅうを尊重そんちょうしなくてはならない。↗
    We have to respect local customs.
  • nounThe loanword; used especially for conventions as large events, such as industry gatherings or fan conventions. For customs, traditions, or treaties, use 慣習, 伝統, or 条約 instead.

Use 大会 for a large meeting or rally, 条約 for an international treaty, 伝統 for traditions handed down over time, 慣習 for accepted customs, and 「コンベンション」 as the loanword for conventions as events.

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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