prefectural police academy; prefectural police training school
Refers to a training facility run by a prefectural police force for new recruits. Compare with 警察学校, which is the national police academy.
See also: 警察学校 (けいさつがっこう)
He graduated from the prefectural police academy and was assigned to a local police box.
警察学校 is the national police academy, while 県警察学校 is a prefectural-level training school.
Compound of 県 (prefecture), 警察 (police), and 学校 (school).