The Meiji Government, which came into being after the Edo bakufu was (Japanese feudal government headed by a shogun) abolished, removed clans and established prefectures; former Ninokuni became Toyooka Prefecture and the area east of Mt. Aoba (Kyoto and Fukui Prefectures) became Tsuruga Prefecture.
江戸幕府が倒されて明治政府が誕生すると、廃藩置県によって、かつての丹国は豊岡県に、青葉山(京都府・福井県)以東は敦賀県になった。