How to say "anonymity" in Japanese

• 匿名とくめいCommon
  no-adjectiveThe common word: anonymity as the state or practice of not giving one's name — a source, donor, or online poster who wishes to remain anonymous, or something done under an assumed name.
  彼かれは匿名とくめいで赤十字せきじゅうじに多額たがくのお金かねを寄付きふした。↗

  He anonymously donated a large sum of money to the Red Cross.
• 匿名性とくめいせい
  nounThe less common word: anonymity framed abstractly as a property or degree — how anonymous something is — rather than the act of withholding a name; typical in discussions of privacy.

Use 匿名 for anonymity as the state or practice of withholding one's name, and 匿名性 when discussing anonymity abstractly as a property or degree; the latter is the less common of the two.

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

• 匿名とくめいanonymity
• 匿名性とくめいせいanonymity