was a town located in Nishisonogi District, Nagasaki Prefecture, Japan.
Population As of 2003, the town had an estimated population of 11,883 and a population density of 546.60 persons per km2. The total area was 21.74 km2.
History On January 4, 2005, Sanwa, along with the towns of Iōjima, Kōyagi, Nomozaki, Sotome and Takashima (all from Nishisonogi District), was merged into the expanded city of Nagasaki and no longer exists as an independent municipality.
References
External links Official website of the City of Nagasaki in Japanese (some English content)