department; section; branch; course; school
Refers to a subdivision within a larger organization, institution, or field of study. Common in academic, corporate, and administrative settings.
The university has many departments.
This research institute is divided into three sections.
subcommittee; subworking group; breakout session
Compound of 分 (ぶん, 'divide') and 科 (か, 'section, department'). The combination naturally yields the meaning of a subdivided branch or department.