Izuhara-machi(42441), Mitsushima-cho(42442), Toyotama-cho(42443), Mine-cho(42444), Kamiagata-cho(42445) and Kamitsushima-cho(42446) in Tsushima-shicho are merged, and Tsushima-shi(42209) is newly established.
厳原町(42441)、美津島町(42442)、豊玉町(42443)、峰町(42444)、上県町(42445)、上対馬町(42446)が合併し、対馬市(42209)を新設