How to say "first-class" in Japanese

• 一流いちりゅうJLPT N2approx.Common
  no-adjectiveCovers 'first-class' in the sense of top-flight: a first-class hotel, restaurant, company or athlete — someone or something regarded as among the best in its field.
  こんな一流いちりゅう選手せんしゅが相手あいてでは勝ち目かちめがない。↗

  We have no chance against those top players.
• 上等じょうとうJLPT N3approx.Common
  no-adjective, na-adjectiveCovers 'first-class' meaning top quality: superior, excellent goods or materials. Use it when the point is the fine quality of a thing rather than rank or reputation.
  どうしてこんな上等じょうとうのぶどう酒しゅを今いままで取とって置おいたのか。↗

  Why have you kept such an excellent wine back till now?
• 甲種こうしゅCommon
  nounReally means 'grade A': the top category in a formal classification. It is a classificatory label, so it is seldom the word you want when you just mean first-class quality.
• 一級いっきゅうCommon
  na-adjective, nounCovers 'first-class' as a graded rank — literally 'one grade', i.e. first grade — so it suits contexts where the top class of a ranking is named; it can also describe first-rate quality.

Choose 一流 for top-flight people, organizations and establishments, 上等 for goods of superior quality, 一級 for first-class as a graded rank or first-rate rating, and 甲種 for 'grade A' labels in formal classifications.

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

• 一流いちりゅうfirst-class
• 上等じょうとうsuperior
• 甲種こうしゅA-grade
• 一級いっきゅうone grade
• 第一流だいいちりゅうfirst-class
• 第１級だいいっきゅうfirst-class
• ちゃきちゃきcapable