How to say "amateur" in Japanese

• 素人しろうとJLPT N2approx.Common
  nounCovers a layman or novice — someone with no professional training or real expertise, often with a slight nuance of inexperience. Typical when contrasting amateurs with professionals in skills, trades, or knowledge.
  あのシロウト歌手かしゅは文句もんくなくタレントショーで一いち位いとなった。↗

  The amateur singer won first in the talent show hands down.
• アマCommon
  nounA casual abbreviation of アマチュア, so it carries the same non-professional sense but only in relaxed, conversational contexts; in formal writing the full form is the safer choice.
• アマチュアJLPT N1approx.Common
  no-adjectiveThe straightforward loanword for an amateur — a person who does something, such as a sport or art, for enjoyment rather than as a profession. This is the neutral default when 'amateur' simply means non-professional.
  私のおじはアマチュアのクリケット選手せんしゅです。↗

  My uncle is an amateur cricket player.
• 門外漢もんがいかんCommon
  nounMost naturally means an outsider or layman with respect to a specialized field, rather than a non-professional practitioner; as a way to say 'amateur' it is secondary, best when stressing that someone stands outside a discipline.

Use 「アマチュア」 as the neutral default for a non-professional, 素人 for a layperson or novice, 「アマ」 as a casual spoken abbreviation, and 門外漢 for someone outside a specialist field.

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

• 素人しろうとamateur
• アマamateur
• アマチュアamateur
• 門外漢もんがいかんoutsider
• 藤四郎とうしろamateur
• 生熟れなまなれinexperienced