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division (of a larger group); branch; field; class (subclass); group; category; department
彼は営業部門から企画部門に異動した。
He transferred from the sales department to the planning department.
各部門の代表者が会議に出席した。
Representatives from each department attended the meeting.
研究開発部門に多くの予算が配分された。
A large budget was allocated to the R&D department.