As of the Tajiri merger but with 2003 population estimates, the district had an estimated population of 45,374 and a population density of 289 persons per km2. The total area is 157.14 km2.
1889 With the establishment of municipal system, Wakuya Village (涌谷村), Motowakuya? Village (元涌谷村), Nonotake Village (箟岳村), Tajiri? Village (田尻村), Numabe Village (沼部村), Ōnuki? Village (大貫村), Kogota Village (小牛田村), Fudōdō Village? (不動堂村), Nakazone Village (中埣村), Kitaura Village (北浦村), Nangō Village (南郷村), Tominaga? Village (富永村) established
1894 District Offices established in Wakuya Town
1907 Kogota becomes a town
1926 District Offices abolished
1954 Kogota Town, Fudōdō Village, Kitaura Village, Nakazone Village, Shikitama Village merge to form Kogota Town
1954 Tajiri Town, Numabe Village, Ōnuk Village merge to form Tajiri Town
1954 Nangō becomes town
1955 Wakuya Town, Nanotake Village merge to form Wakuya Town