How to say "anonymous" in Japanese

• 無名むめいCommon
  no-adjectiveCovers the 'nameless, anonymous' sense: a person, writer, or work that has no known name or reputation. Typical for describing unknown authors, artists, or ordinary unnamed people.
  その詩しは無名むめいの著者ちょしゃが詠よんだ。↗

  The poem was composed by an anonymous author.
• 詠み人知らずよみびとしらずCommon
  expressionRefers specifically to classical poems handed down with their author unknown. In other contexts it is really the phrase 'author unknown' rather than a general way to say anonymous.
• 覆面ふくめんJLPT N1approx.Common
  prenominal modifier, nounDescribes someone concealing their identity — incognito or masked — such as an unnamed critic or reviewer, or an unmarked vehicle. It implies deliberate concealment rather than simply being unknown.

Use 無名 for people or works lacking a name, 「詠み人知らず」 for poems whose author is unknown, and 覆面 for someone acting incognito or unidentified behind a hidden identity.

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

• 無名むめいnameless
• 詠み人知らずよみびとしらずauthor unknown
• アノニマスanonymous
• 作者未詳さくしゃみしょうanonymous
• 名もなきなもなきnameless
• 作者不明さくしゃふめいof unknown authorship
• 覆面ふくめんanonymous