is a district located in northwestern Hiroshima Prefecture, Japan.
As of 2003, the district has an estimated population of 29,978 and a density of 30.34 persons per km2. The total area is 988.11 km2.
Atomic bomb survivor Toshiyuki Mimaki lives in Yamagata district.
Towns and villages Akiōta: founded on October 1, 2004 from the merger of the towns of Kake and Togouchi, and the village of Tsutsuga Kitahiroshima: founded on February 1, 2005 from the merger of the towns of Chiyoda, Geihoku, Ōasa and Toyohira
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