general manager; director-general; head of a headquarters
A title for the head of a 本部 (headquarters, main office, or central division) in an organization, company, or government body. Often used in corporate, police, and military contexts.
He will assume the post of General Manager of the Sales Division next month.
The Chief of the Prefectural Police Headquarters held a press conference.
本部 is the headquarters or central office itself; 本部長 is the person who leads it.
Compound of 本部 (headquarters) and 長 (chief, head).