Precinct noun – A region of activity, knowledge, or influence. Section is a synonym for precinct in area topic. In some cases you can use "Section" instead a noun "Precinct", when it comes to topics like subdivision.
Cool Old Guy: The Section Chief and Detective Tokuno, senior officers at Bokuto, are both about fifty (which is, on average, twice older than most of the other people in the show) and steer their precinct rather impressively.