Oasa (大朝町; -cho) was a town located in Yamagata District, Hiroshima, Japan. On February 1, 2005 the town merged with three other towns from the district forming the town of Kitahiroshima. As of 2003, the town had an estimated population of 3,711 and a density of 41.01 persons per km². The total area was 90.50 km². Source: [wikipedia: oasa, hiroshima]