Katsuta District, OkayamaKatsuta is a district located in Okayama Prefecture, Japan.As of May 1, 2004, the population was 17,888. The area is 123.63 km2.Towns and villagesNagiShōōHistoryPrior to February 28, Katsuta District consisted of:KatsutaNagiShōbokuShōōAs of 2003, the district had an estimated population of 29,056 and a density of 113.58 persons per km2. The total area was 255.82 km2.On February 28, 2005, Shōboku left Katsuta District and became part of the city of Tsuyama.On March 31, 2005, Katsuta left Katsuta District and became part of the city of Mimasaka.