subordinate body; subordinate organization; subsidiary organ
Refers to an office, institution, or agency that operates under a larger parent organization, such as a government ministry, company, or international body.
It operates as a subordinate body of the United Nations, carrying out specialized activities.
There are several research institutes under this ministry as subordinate organizations.
上部機関 means a higher-level or parent organization, the opposite of 下部機関.
下部組織 is a more general term for a subordinate structure or lower-level group, while 下部機関 specifically refers to an official institution or agency.
Compound of 下部 (かぶ, 'lower part, subordinate') and 機関 (きかん, 'organization, institution').