How to say "organ" in Japanese

• オルガンJLPT N2approx.Common
  nounCovers only the musical instrument, such as a pipe organ in a church. It is never used for a body part or for an organization.
  教会きょうかいには普通ふつうオルガンがあります。↗

  There is usually an organ in a church.
• 器官きかんJLPT N1approx.Common
  nounRefers to an organ of a living body, such as the heart or lungs, in medical and biological contexts; this is the word for the anatomical sense.
  私わたしたちは内臓ないぞう器官きかんを調しらべるためにカエルを解剖かいぼうした。↗

  We dissected a frog to examine its internal organs.
• 機関きかんJLPT N3approx.Common
  nounNot the instrument or the body part: it means an agency, organization, or institution, corresponding to 'organ' in phrases like 'the organs of government'.
  この三みっつの機関きかんとは国際通貨基金こくさいつうかききん、国際こくさい復興ふっこう開発銀行かいはつぎんこう、関税かんぜい・貿易ぼうえき一般いっぱん協定きょうていである。↗

  The three organizations are the International Monetary Fund, the International Bank for Reconstruction and Development, and the General Agreement on Tariffs and Trade.

Use 「オルガン」 for the musical instrument, 器官 for an organ of the body, and 機関 only for 'organ' in the sense of an agency, organization, or institution.

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

• オルガンorgan (musical instrument)
• 器官きかんorgan
• 風琴ふうきんorgan
• 機関紙きかんしbulletin
• 機関きかんagency