other prefectures
Refers to prefectures other than the one currently being discussed or the speaker's own. Commonly used in administrative, travel, or statistical contexts.
Tourists from other prefectures are increasing.
This system has also been introduced in other prefectures.
Compound of 他 (other) + 府 (urban prefecture) + 県 (prefecture). The combination 府県 explicitly covers all types of prefectures.