Atsumi District

As a result of various consolidations and mergers of municipalities, the district was incorporated into the cities of Toyohashi and Tahara in 2005.

As of 2004 (the last data available before its dissolution), the district had an estimated population of 21,657 with a density of 263.5 persons per km2.

Prior to its dissolution, the district consisted of only one town: Atsumi-gun is one of the ancient counties of southern Mikawa Province and is mentioned in Nara period records.

Due to its geographic proximity to Ise Province, during the Nara and Heian period, large portions of its lands were managed as shōen controlled by Ise Shrine or under the direct control of the Imperial family.

In a round of consolidation in May 1906, the town of Fukagawa was created, and the remaining number of villages was reduced from 33 to 10.