was a town located in Minamitakaki District, Nagasaki Prefecture, Japan. As of 2003, the town had an estimated population of 5,884 and a density of 224.07 persons per km². The total area was 26.26 km². On October 11, 2005, Mizuho, along with the towns of Aino, Azuma, Chijiwa, Kunimi, Minamikushiyama and Obama (all from Minamitakaki District), was merged to create the city of Unzen. External links Unzen official website Dissolved municipalities of Nagasaki Prefecture ja:瑞穂町