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Minamikushiyama (南串山町 Minamikushiyama-chō) was a town located in Minamitakaki District, Nagasaki Prefecture, Japan.
As of 2003, the town had an estimated population of 4,669 and a density of 314.41 persons per km². The total area was 14.85 km².
On October 11, 2005, Minamikushiyama, along with the towns of Aino, Azuma, Chijiwa, Kunimi, Mizuho and Obama (all from Minamitakaki District), was merged to create the city of Unzen.