How to say "familiarity" in Japanese

• 親しみしたしみCommon
  nounFamiliarity in the sense of warm closeness or affection felt toward a person, or ease of approach to a thing. The common word: choose it whenever 'familiarity' carries a feeling of fondness.
  ペットは私わたしたちに親したしみ以上いじょうのものを与あたえてくれる。↗

  Pets offer us more than mere companionship.
• 馴染みなじみ
  no-adjectiveFamiliarity as being well used to a person, place, or thing through repeated contact, so that it feels comfortable and known. It can also denote the person themselves: an acquaintance, a familiar face.
  あの人ひとはこの店みせの長年ながねんの馴染み客なじみきゃくです。↗

  He's been a patron of this store for many years.
• 昵近じっきん
  nounCloseness or familiarity between people. A less common word that you will mostly meet in writing; in everyday speech 親しみ is the usual choice for this sense.
• 耳馴染みみみなじみ
  nounFamiliarity in the auditory sense: how well a sound, such as a voice or a tune, fits the ear. Use it only when talking about sounds; it does not apply to people or places.
• 昵懇じっこん
  noun, na-adjectiveIntimacy, familiarity, and closeness, with the emphasis on a warm personal relationship. Like 昵近 it is less common and mainly a written word, so it is seldom the natural choice in conversation.

Use 「親しみ」 for warm, affectionate familiarity, 「馴染み」 for being well used to a person, place, or thing, 「耳馴染み」 only for sounds, and the less common 昵近 and 昵懇 for closeness met mainly in writing.

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

• 親しみしたしみintimacy
• 馴染みなじみfamiliarity
• 昵近じっきんfamiliarity
• 耳馴染みみみなじみfamiliarity (of a sound, etc.)
• 昵懇じっこんintimacy
• 親しさしたしさintimacy
• 親近しんきんbonding