How to say "user" in Japanese

• ユーザーCommon
  nounThe direct loanword for 'user'; the default choice for people who use computers, software, apps, or a company's products and services.
  純粋じゅんすいに、ミクシィユーザーが言いうところの「変へんな人ひと」ってどんな人ひとなのか、私にはいまいちわからないのだ。↗

  It's simply that I don't really understand what an "oddball" is when said by a Mixi user.
• 使い手つかいてCommon
  nounThe person who actually uses or handles something, viewed from the using side rather than the making side; it can also mean one's employer, the party people work for.
• 利用者りようしゃCommon
  nounA person who makes use of a service, facility, or system; the word you see in announcements and signs addressing library users, transit riders, and website visitors.
  私が関心かんしんがあるのは車くるまではなくその利用者りようしゃの方ほうだ。↗

  It is not the car but the users that I am concerned about.
• 使用者しようしゃCommon
  nounThe person or party that uses something, such as equipment or facilities; typical contexts are business documents and legal texts.
  特定とくていの文脈ぶんみゃくでどんな語ごを使つかうべきか知しっている人ひとは語ごの有効ゆうこうな使用者しようしゃである。↗

  An effective writer is one who knows what sort of words should be employed in any specific context.
• 持ちもちJLPT N1approx.Common
  noun, noun (suffix)Really a word for having, holding, or owning something rather than for a person; you will seldom want it to translate 'user'.
  腰痛ようつう持もちです。↗

  I have back problems.

Use 「ユーザー」 for people using products or software, 利用者 for users of services and facilities, 使用者 for the using party in business or legal writing, 「使い手」 for the person doing the using; 「持ち」 does not mean 'user'.

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

• ユーザーuser
• 使い手つかいてuser
• 利用者りようしゃuser
• 使用者しようしゃuser
• 持ちもちhaving
• 利用客りようきゃくuser
• 消費者しょうひしゃconsumer (of a product, service, etc.)
• 住人じゅうにんuser (of a website)
• 民みんuser (of a website, esp. as a collective, e.g. Twittersphere)
• 使いつかいuse