How to say "outsider" in Japanese

Choosing the right word
  • nounThe loanword covers the general sense of someone who does not belong to a group, circle, or establishment, often with a nuance of standing on society's margins; use it for social or cultural outsiders.
  • 門外漢もんがいかんCommon
    nounThis covers an outsider to a specialist field: a layman or amateur with no expert knowledge. When English 'outsider' means someone unversed in a discipline or profession, this is the natural choice.
  • 第三者だいさんしゃCommon
    nounThis covers an outsider as a third party: someone not directly involved in a matter, dispute, or transaction, often a disinterested, neutral figure. It is not the word for a social outsider or layman.
    第三者だいさんしゃが解読かいどくを試こころみても、この暗号あんごうを解読かいどくすることはできない。↗
    A potential third party would not be able to crack the code.

Use 「アウトサイダー」 for someone outside a group or society, 門外漢 for a layman outside a specialist field, and 第三者 for a neutral third party uninvolved in a matter.

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

Japanese equivalents
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