January 1, 2006: Sonobe-cho, Yagi-cho and Hiyoshi-cho were merged with Miyama-cho, Kita-Kuwada-gun (Kyoto Prefecture) to form Nantan City, and the city was separated from the gun (district) system.
2006年1月1日-園部町・八木町・日吉町が北桑田郡美山町(京都府)と合併し、南丹市が発足、郡より離脱。