How to say "congress" in Japanese

• 議会ぎかいJLPT N3approx.Common
  nounCovers 'congress' in its political sense: a national legislature that makes laws, such as a parliament or congress. This is the word you want for the institution and its lawmaking.
  議会ぎかいはさいごにけんかになった。↗

  The argument ended in a fight.
• 議院ぎいんCommon
  nounAlso denotes a legislature, but with the nuance of the house or deliberative body itself rather than the institution as a whole; for that, 議会 is the word you want.
• 会議かいぎJLPT N4approx.Common
  noun, suru verb, intransitive verb, transitive verbMatches 'congress' only in the sense of a formal meeting or conference — a gathering of people to discuss something. It does not name a legislature, so it is not the word for the political sense.
  会議かいぎに彼かれは現あらわれましたか。↗

  Did he show up at the meeting?

For 'congress' as a lawmaking institution use 議会; 議院 also denotes a legislature but suggests the house or deliberative body itself; 会議 fits only the sense of a formal meeting or conference.

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

• 議会ぎかいcongress
• 議院ぎいんparliament
• 会議かいぎmeeting
• コングレスcongress
• 交合こうごうsexual union
• 国会こっかいlegislative assembly