Except Kameoka city, the former Sonobe-cho and Yagi-cho in the Funai District, these areas were far from the capitals of each prefecture, and were not considered important by the national government, and the population grew smaller and smaller during the period of high economic growth.
亀岡市及び旧船井郡園部町、八木町を除き都道府県庁所在地から遠くはなれ、両府県および国の施策からは重きを置かれずにいたので、高度経済成長にいっそうの過疎が強まった。