How to say "officer" in Japanese

• 士官しかんCommon
  nounCovers 'officer' in the military sense: a commissioned officer in the armed forces, holding rank and command. It does not cover the officers of a company or organization; that is a different word.
  彼かれは海軍かいぐん士官しかんの任務にんむを受うけた。↗

  He has received a commission as a naval officer.
• 役員やくいんCommon
  nounCovers 'officer' in the corporate sense: an executive or director of a company, or an official or person in charge of an organization; think of a firm's board and management.
• 運転士うんてんしCommon
  nounCovers 'officer' only in the nautical sense: a ship's officer, such as the mate of a merchant vessel. Elsewhere the word means a train driver, so it is seldom what you want for 'officer' outside shipping.

Choose 士官 for military officers, 役員 for a company's or organization's officers, and 運転士 only when 'officer' means a ship's officer or mate; the surrounding context decides.

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

• 士官しかんofficer
• オフィサーofficer
• 高級船員こうきゅうせんいんofficer (of a ship)
• 役員やくいんofficer
• 運転士うんてんしmate (on a ship)
• 執行者しっこうしゃexecutive