noun
section chief; office head; room manager
Refers to the person in charge of a specific room, section, or office within an organization, such as a laboratory, a school staff room, or a company department. The exact English equivalent depends on the context.
彼は研究所の室長に昇進した。
He was promoted to laboratory manager at the research institute.
室長が会議の日
The section chief will coordinate the meeting schedule.