was a town located in Minamitakaki District, Nagasaki Prefecture, Japan.As of 2003, the town had an estimated population of 7,870 and a density of 322.81 persons per km2. The total area was 24.38 km2.
On March 31, 2006, Kazusa, along with the towns of Arie, Fukae, Futsu, Kitaarima, Kuchinotsu, Minamiarima and Nishiarie (all from Minamitakaki District), was merged to create the city of Minamishimabara.[1] [2]
A population of resident dolphins around Tsuuji shima provides opportunities for dolphin watching and this largely contributes local tourism.