How to say "aide" in Japanese

• 副官ふくかんCommon
  nounThe military sense: an officer who assists a senior commander, corresponding to 'aide-de-camp' or 'adjutant'. This is the common word for that kind of aide.
  副官ふくかんは戦術せんじゅつの変更へんこうを彼かれに提案ていあんした。↗

  The aide suggested a change in tactics to him.
• 補佐官ほさかん
  nounAn aide to a senior official such as a government minister; it reads as an official title or position rather than a general word for a helper.
• 介助者かいじょしゃ
  nounA person who gives hands-on help with daily activities to elderly or disabled people; this is the 'aide' that overlaps with 'caregiver' or 'helper'.
• 補佐人ほさにん
  nounA legal term for a person who assists a party in court proceedings; for the everyday sense of 'aide' it is seldom the word you want.
• 人手ひとで
  nounMeans 'hands' or manpower — extra workers for a task — rather than a personal aide; seldom the right choice for 'aide'.
  人手ひとでが多おおければ仕事しごとは楽たのしい。↗

  Many hands make light work.

Use the common 副官 for a military aide-de-camp, 補佐官 for an aide to a senior official, and 介助者 for a care assistant; 補佐人 and 人手 are marginal ways to say 'aide'.

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

• 副官ふくかんadjutant
• 補佐官ほさかんaide
• 介助者かいじょしゃaide
• 補佐人ほさにんassistant
• 人手ひとでhand (worker)
• 随身ずいじんattendant