noun
prefectural police headquarters
Refers to the main police office of a Japanese prefecture, overseeing local police stations.
事件の詳細は県警察本部から発表された。
Details of the incident were announced by the prefectural police headquarters.
警察署 is a local police station, while 県警察本部 is the prefectural headquarters that oversees them.
Compound of 県 (prefecture), 警察 (police), and 本部 (headquarters).