鶴岡市(06203)、藤島町(06423)、羽黒町(06424)、櫛引町(06425)、朝日村(06427)、温海町(06441)が合併し、鶴岡市を新設
Tsuruoka-shi(06203), Fujishima-machi(06423), Haguro-machi(06424), Kushibiki-machi(06425), Asahi-mura(06427) in Higashitagawa-gun and Atsumi-machi(06441) in Nishitagawa-gun are merged, and Tsuruoka-shi is newly established.